{"title":"All Products","description":"","products":[{"product_id":"maxwells-spinning-top","title":"Maxwell's Spinning Top Kit - RED","description":"\u003cp\u003e\u003cspan\u003eAn amazing physics toy...\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cspan class=\"ng-scope\"\u003eThis spinning top was originally designed by the Scottish physicist James Clerk Maxwell over 100 years ago as a device to demonstrate the strange properties of rotating bodies to his physics students. Specifically, Professor Maxwell wanted to be able to show, as convincingly as possible, that a gyroscope will always react at 90 degrees to an applied force.\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eWhen this massive brass bell-shaped top is spinning an interesting stability can occur - push on the stem with an object (like a pencil) and the top will push back, forcing the stem against that object, and friction will cause the stem to roll along and trace the edge of the object.\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eIn this design the stem will trace along the edge of a metal spiral, clinging to it like a magnet - but magnets are NOT involved here. The key to this design is to make the contact point\/tip of the top at its own centre of mass, then any frictional force in contact with the stem will produce a torque about the contact point at right angle to the direction of friction that creates the stabilizing force (students of physics may recognize application of the right hand rule here). An extreme physics toy! \u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eIf you look closely, you will see a slight difference in behaviour, depending on which direction you spin the top. Spin it in one direction and the metal tip holds closely to the spiral as it reaches the centre, and switches to the other side of the spiral. Spin it the other way and the metal tip separates briefly from the spiral, when it reaches the centre. \u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eTHIS ITEM REQUIRES SOME ASSEMBLY. \u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eAssembly will take 10-15 minutes. There are six screws, all of which are fastened with the supplied Hex key (Allen key). Full instructions enclosed.  \u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"GrandIllusions","offers":[{"title":"Default Title","offer_id":49046576955739,"sku":"1109","price":59.95,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/maxwellsspinningtop800x600.jpg?v=1730222731"},{"product_id":"gaussian-gun","title":"Gaussian Gizmo","description":"\u003cp\u003e\u003cspan\u003eRoll the loose ball bearing down the track. Then something unexpected happens...\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cspan class=\"ng-scope\"\u003eWhy is it called the Gaussian Gun? Well, no reason really, except that a friend of ours just christened it that, and the name seems to have stuck. It is really very simple, which is why we like it! A plastic channel supports the row of 4 ball bearings, and a spherical neodymium magnet. At first sight, it looks like 5 ball bearings!\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eVery slowly, you roll the loose ball bearing towards the magnet. As it approaches, it is pulled into the magnet very quickly, neodymium magnets are very strong. And as a result, rather like that Newton's Cradle executive toy we used to see a few years ago, the ball bearing at the other end shoots off at a surprisingly high velocity.\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eWhat happens if there are only three ball bearings? Two?\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eOur original version of this item used 2 cylindrical neodymium magnets. However we received an e-mail from Simon Poliakoff, who teachers physics here in the UK, suggested that the use of a spherical neodymium magnet made the demonstration much better, and certainly more enigmatic. So we sourced the spherical magnets, and can now offer you Gaussian Gun 2.0 - thank you Simon. I hope your students appreciate you as much as we do!\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eCONTAINS MAGNETS. SUITABLE FOR CHILDREN 16 YEARS AND OVER\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eMade in UK\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Grand Illusions","offers":[{"title":"Default Title","offer_id":49238821568859,"sku":"22","price":18.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/gaussian_gun_800x600_7d6db6df-57ea-4224-938c-f2711d330a97.jpg?v=1728993578"},{"product_id":"magnificent-dinosaur-machine","title":"Magnificent Dinosaur Machine","description":"\u003cp\u003e\u003cspan\u003eTurn the handle to watch the Dinosaur walk and ROAR! Darwin the cat gets a bit scared by the roar and disappears down the chimney.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ng-scope\" droid=\"\"\u003eThe Totally Glueless Magnificent Dinosaur Machine is an automaton – a moving machine. The kit comes in a box with everything you need to get it working. Push out the pieces from the frame and slot them together by following the instructional poster. No glue required! Once assembled, turn the handle to watch the Dinosaur walk and ROAR! Darwin the cat gets a bit scared by the roar and disappears down the chimney.\u003c\/p\u003e\n\u003cp class=\"ng-scope\" droid=\"\"\u003eIt is made entirely from cardboard so all the waste is completely compostable or recyclable.\u003c\/p\u003e\n\u003cp class=\"ng-scope\" droid=\"\"\u003eThe Magnificent Dinosaur Machine is suitable for adults and children alike although it can be described more as an interactive ornament than a toy. The walking machine will delight anyone but is most suited to people over the age of eight. Younger children will certainly love it but may find it difficult to assemble without the help of an older person, making it a fabulous project for the family.\u003c\/p\u003e\n\u003cp class=\"ng-scope\" droid=\"\"\u003e\u003cspan\u003eWe have given it a difficulty rating of 4 out of a possible 5.\u003c\/span\u003e\u003c\/p\u003e","brand":"Grand Illusions","offers":[{"title":"Default Title","offer_id":49238873899355,"sku":"922","price":21.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/magnificentdinosaurmachine1800x600.jpg?v=1728994072"},{"product_id":"tumbling-top-1","title":"Tumbling Top","description":"\u003cp\u003e\u003cspan\u003eThis elegant metal top has two completely different shapes, each one with a different motion.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cspan class=\"ng-scope\"\u003eThis elegant metal top has two completely different shapes, each one with a different motion. One shape behaves like a normal spinning top. But twist the two halves of the top by 90 degrees, and you now have an 'Oloid' shape. On a gentle slope, or if you give the Oloid a slight push, it will 'wobble' across the surface. The Oloid has the same action as the 'Wobbler'.\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eThe top is made of aluminium, and is about 33 mm high. As in the picture, one half is either gold or silver coloured, and the other half is blue. The top comes packed in an elegant foam block, and is made by the same designer who makes the Tippe Top.\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eMade in EU\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Grand Illusions","offers":[{"title":"Default Title","offer_id":49238889988443,"sku":"3","price":45.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/tumblingtop1800x600.jpg?v=1728994215"},{"product_id":"sea-serpent-pop-up-card","title":"Sea Serpent Pop Up Card","description":"\u003cp\u003e\u003cspan\u003eStrange things happen at sea...\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv class=\"ng-scope\"\u003eThe ship seems to be sailing serenely along, beneath the light of a crescent moon. When suddenly... a huge sea serpent arises from the depths and seizes the ship in its mighty coils. We are not sure exactly what happens next, but let us just say we are pleased not to be on board! \u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003eHand made in Portugal, this pop up card comes complete with an elegant envelope, which pictures a mermaid! \u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003eThe card is 14 x 19cm\u003c\/div\u003e","brand":"Grand Illusions","offers":[{"title":"Default Title","offer_id":49238911549787,"sku":"1123","price":11.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/sea_serpent_1_800_x_600.jpg?v=1728994402"},{"product_id":"infinity-spinning-top","title":"Infinity Spinning Top","description":"\u003cp\u003e\u003cspan\u003eOne spin and it will spin forever... well, as long as the batteries last anyway!\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cspan class=\"ng-scope\"\u003eOne spin and it will spin forever... well, as long as the batteries last anyway! Once the central button has been activated, the mesmerising top will then spin for hours or maybe even days on end. 32 different light patterns flash a kaleidoscope of colour before your eyes. Great executive desk toy. Uses 3 AAA 1.5v batteries which are included. Colour of top may vary. Comes in a smart presentation box.\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Grand Illusions","offers":[{"title":"Default Title","offer_id":49238919381339,"sku":"679","price":11.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/infinityspinningtop800x600.jpg?v=1728994660"},{"product_id":"the-levitator","title":"The Levitator","description":"\u003cdiv class=\"c-ox-product-detail__small-description  c-ox-product-detail__fullwidth\"\u003e\u003cspan class=\"PBLongTxt PBItemShortDesc\"\u003eA fascinating visual device that defies description! \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv class=\"c-ox-product-detail__option  c-ox-product-detail__fullwidth\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"c-ox-product-detail__price  c-ox-product-detail__fullwidth\"\u003e\n\u003cdiv class=\"PBItemPrice\"\u003e\n\u003cdiv class=\"PBCurrency\"\u003e\n\u003cdiv class=\"ng-scope\"\u003eThe power of magnetic forces combine to create a mind-blowing visual effect! \u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003eThe device appears to float and spin as if by magic.\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003eThe perfect gift for those with an inquisitive mind. \u003cbr\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Grand Illusions","offers":[{"title":"Default Title","offer_id":49239172219227,"sku":"1115","price":8.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/thelevitator1800x600.jpg?v=1729007656"},{"product_id":"tensegrity-table-kit-red","title":"Tensegrity Table Kit - Red","description":"\u003cdiv class=\"c-ox-product-detail__small-description  c-ox-product-detail__fullwidth\"\u003e\u003cspan\u003eAppears to float in mid air!\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv class=\"c-ox-product-detail__small-description  c-ox-product-detail__fullwidth\"\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv class=\"c-ox-product-detail__small-description  c-ox-product-detail__fullwidth\"\u003e\n\u003cdiv class=\"ng-scope\"\u003eTensegrity is short for tensional integrity which was coined by Buckminster Fuller. It is sometimes known as a floating compression structure. The really fun thing about this table is that at the initial glance it appears to be floating in mid-air. Yet you can use it like a normal table. Place something on the tensegrity table and it appears just to sit on the table floating in mid-air. Quite mesmerizing!\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003eSo what is it? Well a conventional table is under compression, increasing the weight on the table increases compression on the legs. A tensegrity table works differently. Although it has some components under compression, they are in a network of parts in tension. In our Tensegrity there is a central cable that is holding the top half up. The cable is under tension. The cables around the periphery keep the table surface central. Cutting any of the cables would result in the top part of the table falling over.\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003eThe Tensegrity table is supplied as a kit.\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cul class=\"ng-scope\"\u003e\n\u003cli\u003eAppears to float in mid-air\u003c\/li\u003e\n\u003cli\u003ePlates made from anodised aluminium\u003c\/li\u003e\n\u003cli\u003eBritish designed and made\u003c\/li\u003e\n\u003cli\u003ePrecision CNC parts\u003c\/li\u003e\n\u003cli\u003eDemonstrates tensional integrity principle\u003c\/li\u003e\n\u003cli\u003eTable appears to float\u003c\/li\u003e\n\u003cli\u003eHigh quality fine cables\u003c\/li\u003e\n\u003cli\u003eFully adjustable cable tension for perfect balance\u003c\/li\u003e\n\u003cli\u003eKit takes 15 - 20 minutes to assemble. All tools included\u003c\/li\u003e\n\u003cli\u003e92mm Diameter and about 126mm high (3.6 inch diameter x 4.96inch)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"c-ox-product-detail__price  c-ox-product-detail__fullwidth\"\u003e\n\u003cdiv class=\"PBItemPrice\"\u003e\n\u003cdiv class=\"PBCurrency\"\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Grand Illusions","offers":[{"title":"Default Title","offer_id":49241033998683,"sku":"1110","price":45.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/tensegritytable-red1A800x600.jpg?v=1729008090"},{"product_id":"tensegrity-phone-holder-kit-red","title":"Tensegrity Phone Holder Kit - Red","description":"\u003cdiv class=\"ng-scope\"\u003eConvenient hands-free use: Avoid arm fatigue caused by holding your phone for long periods of time.\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003eAdditional screen: Allows you to use your phone as an additional screen in your office environment.\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003eConvenient viewing angle: Your phone is held at a convenient viewing angle which can reduce neck and eye strain. Perfect for video calling, checking emails, checking notifications etc.\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003eUnique design: The Tensegrity Phone Stand is totally unique and has as a stylish and modern crisp look.\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003eTensegrity is short for tensional integrity which was coined by Buckminster Fuller. It is sometimes known as a floating compression structure. The really fun thing about this table is that at the initial glance it appears to be floating in mid-air. Yet you can use it like a normal table. Place something on the tensegrity table and it appears just to sit on the table floating in mid-air.\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003eQuite mesmerizing to see.\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003eSo what is it? Well a conventional table is under compression, increasing the weight on the table increases compression on the legs. A tensegrity table works differently. Although it has some components under compression, they are in a network of parts in tension. In our Tensegrity there is a central cable that is holding the top half up. The cable is under tension. The cables around the periphery keep the table surface central. Cutting any of the cables would result in the top part of the table falling over.\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003eOur CNC machined Tensegrity phone table is supplied as a kit.\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\n\u003cul class=\"ng-scope\"\u003e\n\u003cli\u003eSupports almost all modern phones\u003c\/li\u003e\n\u003cli\u003eHoneycomb design\u003c\/li\u003e\n\u003cli\u003eNon-slip rubber feet\u003c\/li\u003e\n\u003cli\u003eBritish designed and made\u003c\/li\u003e\n\u003cli\u003eSupplied as a self-assembly kit\u003c\/li\u003e\n\u003cli\u003eFully adjustable cable tension for perfect balance\u003c\/li\u003e\n\u003cli\u003ePrecision CNC parts\u003c\/li\u003e\n\u003cli\u003eDemonstrates tensional integrity principle\u003c\/li\u003e\n\u003cli\u003eAppears to float\u003c\/li\u003e\n\u003cli\u003eHigh quality fine cables\u003c\/li\u003e\n\u003cli\u003eAnodised aluminium construction\u003c\/li\u003e\n\u003cli\u003eMesmerizing to see\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Grand Illusions","offers":[{"title":"Default Title","offer_id":49285144707419,"sku":"1111","price":65.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/tensegrityphoneholder-red1800x600.jpg?v=1729514015"},{"product_id":"cylinder-in-the-box","title":"Cylinder in the Box","description":"\u003cdiv class=\"ng-scope\"\u003e\u003cspan\u003eAmbiguous Objects - it all depends on your point of view!\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\n\u003cdiv class=\"ng-scope\"\u003eA circle, in the centre of a square. But viewed from the other side - or in a mirror  - and there are now four circles in the square! \u003cbr\u003e\u003cbr\u003eRotate it back, it again, it is just a single circle, in the centre of a square. However when you look around the edge, there are four half circles and four quarter circles. So in a way, if you add up all the fractions, it is still four circles...\u003cbr\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003eCreated by Kokichi Sugihara, a Japanese mathematician and artist known for his three-dimensional optical illusions. His illusions, which often involve videos of three-dimensional objects shown from carefully chosen perspectives, have won a number of awards at the Best Illusion of the Year Contest. \u003cbr\u003e\u003cbr\u003e62 x 62mm\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Grand Illusions","offers":[{"title":"Default Title","offer_id":49285172494683,"sku":"1106","price":16.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/cylinderinthebox1800x600.jpg?v=1729514457"},{"product_id":"rounding-square","title":"Rounding Square","description":"\u003cdiv class=\"ng-scope\"\u003e\u003cspan\u003eAre those circles? Or are they squares?\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\n\u003cdiv class=\"ng-scope\"\u003eThis optical illusion is also known as an ambiguous object - an object that changes its appearance when reflected in a mirror. \u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003eRounding Square from one angle looks like four overlapping circles. Viewed from the opposite direction, it looks like four overlapping squares. If you place the object on the table and position a mirror behind it, you can see both shapes at the same time!\u003cbr\u003e\u003cbr\u003eCreated by Kokichi Sugihara, a Japanese mathematician and artist known for his three-dimensional optical illusions. His illusions, which often involve videos of three-dimensional objects shown from carefully chosen perspectives, have won a number of awards at the Best Illusion of the Year Contest. \u003c\/div\u003e\n\u003c\/div\u003e","brand":"Grand Illusions","offers":[{"title":"Default Title","offer_id":49285254414683,"sku":"994","price":16.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/roundingsquare1800x600.jpg?v=1729515015"},{"product_id":"heart-metamorphosis","title":"Heart Metamorphosis","description":"\u003cp\u003e\u003cspan\u003eAmbiguous Objects look completely different when viewed in a mirror...\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003eFour hearts, joined together in a row. But when viewed from the other side, or viewed in a mirror, the four hearts turn into the four suits, diamond, heart, club and spade. How is that possible? In fact, there is another subtlety going on - the heart is the right way up, whichever way you look at it!  \u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eCreated by Kokichi Sugihara, a Japanese mathematician and artist known for his three-dimensional optical illusions. His illusions, which often involve videos of three-dimensional objects shown from carefully chosen perspectives, have won a number of awards at the Best Illusion of the Year Contest. \u003cbr\u003e\u003cbr\u003eIt is 8cm wide. \u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e","brand":"Grand Illusions","offers":[{"title":"Default Title","offer_id":49285382373723,"sku":"993","price":16.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/heartmetamorphosis1800x600.jpg?v=1729515541"},{"product_id":"ladies-and-gentlemen","title":"Ladies and Gentlemen","description":"\u003cp\u003e\u003cspan\u003eExcuse me sir... oh, I beg your pardon madam!\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cspan class=\"ng-scope\"\u003eThis optical illusion is also known as an ambiguous object - an object that changes its appearance when reflected in a mirror! \u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eFrom one angle, it appears to be the silhouette of a man. Twist it through 90 degrees, and it morphs into the silhouette of a woman. With a mirror placed behind, it can appear to be both a man and a woman at the same time!\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eCreated by Kokichi Sugihara, a Japanese mathematician and artist known for his three-dimensional optical illusions. His illusions, which often involve videos of three-dimensional objects shown from carefully chosen perspectives, have won a number of awards at the Best Illusion of the Year Contest. \u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Grand Illusions","offers":[{"title":"Default Title","offer_id":49285441093979,"sku":"995","price":16.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/ladiesandgentlemen1800x600.jpg?v=1729515820"},{"product_id":"pentakis-kaleidoscope","title":"Pentakis Kaleidoscope","description":"\u003cp\u003e\u003cspan\u003eA three-sided mirror kaleidoscope with a fivefold symmetry axis\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cspan class=\"ng-scope\"\u003eThe Pentakis Dodecahedron Kaleidoscope is a three-sided mirror kaleidoscope – a simple but ingeniously formed sheet of metal that opens up an astonishing optical microcosm.\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv class=\"ng-scope\"\u003eIn order to generate maximum light reflection (95%), the aluminium surface of the Pentakis is vacuum-coated with silicide and titanium. Incident light creates a twelve-rayed Kepler star (named after mathematician Johannes Kepler, 1571 – 1630). Thanks to the fivefold symmetry axis, the three dihedral angles (60°-72°-60°) reflect and re-reflect light to create a spherical Pentakis Dodecahedron, generating a total of exactly 60 reflections.\u003c\/div\u003e","brand":"Grand Illusions","offers":[{"title":"Default Title","offer_id":49285490082139,"sku":"1036","price":26.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/pentakis_kaleidoscope800x600.jpg?v=1729516063"},{"product_id":"mosaic-art-cards","title":"Mosaic Art Cards","description":"\u003cp\u003e\u003cspan\u003eFive postcards, each with a famous painting in mosaic form...\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv class=\"ng-scope\"\u003eA set of 5 postcards, each of which has a simple pattern. At first, they just seem to be a random collection of coloured squares. But as you hold each postcard further away, the squares start to blur slightly, and you should be able to see a famous picture. \u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003eThe pictures are \u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003eGirl with a Pearl Earring, Johannes Vermeer\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003eMona Lisa, Leonardo da Vinci\u003cbr\u003eThe Scream, by Edvard Munch\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003eThe Great Wave, Katsushika Hokusai\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003eOtani Oniji in the role of the Servant Edobei, Toshusai Sharaku\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003eWith the exception of maybe the last one, these are all quite well known pictures. We have found that you need to be at least slightly familiar with the original painting, in order to be able to 'see' the mosaic art card version. \u003c\/div\u003e","brand":"Grand Illusions","offers":[{"title":"Default Title","offer_id":49285543264603,"sku":"1000","price":14.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/mosaicartcards2800x600.jpg?v=1729516538"},{"product_id":"upside-down-scope","title":"Upside Down Scope","description":"\u003cdiv class=\"ng-scope\"\u003eThis single-prism optical inversion device will show you the world upside down!\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003eLike a camera lens, light entering our eyes produces an inverted image on the viewer's retina. The fact that we see the world the right way up is the result of adaptation using the brain's processing capacity to flip the image. \u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003eThe effect of looking through the Upside Down Scope is to optically rotate the viewer's image around the line of sight by 180 degrees. This produces an upside down image which gives us incorrect spatial information, and explains why we have difficulty carrying out simple tasks when seeing this way.\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003eThe Upside Down Scope requires some assembly. No glue is required, the kit comes with 2 sticky pads, which is all the adhesive that is required. At the heart of the scope is a single glass prism. This gives a wide field of view when you look through the scope. \u003c\/div\u003e","brand":"Grand Illusions","offers":[{"title":"Default Title","offer_id":49285570068827,"sku":"926","price":75.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/upsidedownscope2800x600.jpg?v=1729584616"},{"product_id":"reversing-goggles","title":"Reversing Goggles","description":"\u003cp\u003e\u003cspan class=\"ng-scope\"\u003eThese amazing Reversing Goggles allow you to view the world upside down! The plastic goggles hold two Dove plexiglass prisms, which invert the image. Alternatively, you can adjust the prisms in order to create right-left inversion.\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eSince the time of Leonardo da Vinci (1452 - 1519) people have wondered about the fact that the images of the world that fall on our retina are upside down, yet we see the world the right way up. Back in the 1890s the American scientist George Stratton conducted an experiment to see what would happen if he viewed the world through an inverting prism. He found that after 4 days, his brain started to compensate, and he could see the world the right way up again.\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eWe are not suggesting that you recreate George Stratton's experiment. However, it is fascinating to wear the upside down googles and try to shake hands with someone, pick up an object, pour water from a jug into a glass, try and write, or find your way around (with someone else there to guide you of course). When we view the world normally, our brain reverses the images on our retina in both the up-down and right-left directions. These prisms reverse the up-down direction only. However if you rotate them by 90 degrees, they will then reverse left-right instead.\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eThe kit includes the lightweight, ventilated plastic housing, two prism holders in MDF (medium density fibreboard), two high quality Dove prisms in lightweight plexiglass giving a 35x20mm view, plus a small file for smoothing edges. A small amount of assembly is required. You will need a protractor in order to measure a right angle and some 2 part adhesive which hardens quickly. Optionally, you can apply some black paint to the prism surfaces which are not needed, which will improve the picture quality slightly. Suggested Age 18+. Made in Germany.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"ng-scope\"\u003e\u003cspan\u003eWatch Alan Davies and Phil Jupitus trying them out on QI in the video.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"ng-scope\"\u003e\u003cstrong class=\"ng-scope\"\u003eSafety Notice.\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eWearing these goggles will cause you to lose your normal orientation. Do not make any movements while you are wearing them which could cause you to fall and injure yourself. If you want to examine the effects of inverting your vision, you should wear the goggles for at least an hour. However some people may feel unwell if they wear the goggles for a long time. If this happens, discontinue their use. We probably don't need to say this, but don't drive, drink alcohol or operate heavy machinery while wearing these reversing goggles!\u003c\/span\u003e\u003c\/p\u003e","brand":"Grand Illusions","offers":[{"title":"Default Title","offer_id":49285643174235,"sku":"379","price":55.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/reversinggoggles2800x600.jpg?v=1729518945"},{"product_id":"the-hollow-face-illusion","title":"The Hollow Face Illusion","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"ng-scope\"\u003eThe Hollow Face Illusion is probably one of the most amazing optical illusions we have come across. The mask can be stood up in a window and the whole face seems to follow you as you move around the room. Truly, an amazing illusion...   \u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003eGrand Illusions has commissioned this particular version of the Hollow Face Illusion, featuring Albert Einstein. It is made from a very strong plastic (opal styrene) and is virtually unbreakable. \u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003eRichard Dawkins mentions this illusion in his recent book 'The God Delusion.'\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003eHow does it work? Well, when we 'see' something, our view of the world has been processed by our brain. And our brain 'knows' that a face is convex, not concave, so that is the way we see it. When we move, the face does not move in the way that a convex face would move, so our brain comes up with a different explanation, and we see the face move, following us wherever we go!\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003eThe mask is 43cm high and 31cm wide.\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003eThe BBC television programme QI, hosted by Stephen Fry, featured the Einstein Mask. Watch the video.\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003eMade in UK\u003c\/div\u003e","brand":"Grand Illusions","offers":[{"title":"Default Title","offer_id":49285864685915,"sku":"4","price":65.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/hollowfaceillusion.jpg?v=1729521133"},{"product_id":"pseudoscope","title":"Pseudoscope Kit","description":"\u003cdiv class=\"ng-scope\"\u003eSome years ago, we took delivery of a small number of Pseudoscopes, designed and made by Terry Pope, who is probably the UK expert on devices of this kind. It was made to a very high quality, it was supplied in a metal flight case, and it cost USD750! After they sold out, we sold a cardboard construction kit to make a Pseudoscope, but it was time consuming to make, and the lack of glass front silvered mirrors reduced the quality of the image. It was very cheap though. Now, however, we think we have the best of both worlds. Designed by Terry Pope, this Pseudoscope kit is made from precision laser-cut pieces of acrylic plastic, and it is supplied with 4 glass mirrors. Although you do need to put the Pseudoscope together yourself, it is a much easier construction task than the cardboard kit, and delivers a high quality Pseudoscopic image. \u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003eThe Pseudoscope creates one of the most remarkable of all optical illusions, and was first described by Sir Charles Wheatstone in the 1830s. The Pseudoscope swaps the incoming images, so that the right eye sees what the left eye would have seen, and vice versa. The Pseudoscope therefore does to front and back what a mirror does to left and right. This means that foreground becomes background and visible background becomes foreground, or more simply, background advances, foreground recedes. \u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003eWhen you view objects with this scope, the convex becomes concave. A tree turns inside out as it were - it's front branches appear at the back, whilst the back branches come out in front, hanging or suspended in mid-air as their support is eclipsed by branches in front. \u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\n\u003cdiv class=\"ng-scope\"\u003eThe scope will suggest to the viewer that a person's face is hollow or concave but your brain refuses to accept such nonsense and so peoples' heads merely appear odd or uncomfortable to look at. It is best then to choose to look at a landscape or tree or anything which may suggest ambiguous perspective. In a real sense Pseudoscopic vision fights `normal vision'. It is, after all, a major alteration to the way information is being presented to the brain for processing, and some people, not all, find there is initially at least, a tendency to suppress the extraordinary interpretation of space it reveals. Because of this unfamiliarity, the full Pseudoscopic experience might take a little time to assert itself. Some people find that they can never see a Pseudoscopic image. \u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003eThese Pseudoscopes come as a kit form, and require assembly. \u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003eThe main body of the Pseudoscope is made of pieces of laser-cut acrylic. The 4 mirrors are already cut to size, and come complete with double sided sticky pads, so no glue is needed. There is a tripod\/screw adaptor. Also in the box is a expanding sphere and a memory foil wand, which together act as a 'Pseudoscopic target'. Plus a set of instructions. \u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003eExperience space on the ‘Flipside’!\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003eThe acrylic parts need to be assembled carefully to avoid snapping them, and we would therefore not recommend the kit for people under 16 years. \u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003eMade in the UK\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Grand Illusions","offers":[{"title":"Default Title","offer_id":49286124077403,"sku":"793","price":75.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/pseudoscope1800x600.jpg?v=1729523816"},{"product_id":"wide-and-long-puzzle","title":"Wide and Long Puzzle","description":"\u003cp\u003e\u003cspan class=\"ng-scope\"\u003e\u003cspan\u003eThis famous optical illusion originally appeared in print. This wooden version was then created some years later by an artisan in Germany. Even if you know how it works, it still seems impossible!\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"ng-scope\"\u003e\u003cspan\u003eThe illusion looks a little like two boxes of different shapes. The one on the left has a long thin top, the one on the right a shorter and wider top. Both these pieces can be removed by pushing then from the back, and you will then discover that you can replace them the other way around. They really are the same size and shape, even though your eyes tell you differently! \u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eMade in Germany\u003c\/span\u003e\u003c\/p\u003e","brand":"Grand Illusions","offers":[{"title":"Default Title","offer_id":49286449758555,"sku":"292","price":17.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/wideandlongpuzzle800x600.jpg?v=1729526551"},{"product_id":"true-mirror","title":"True Mirror","description":"\u003cp\u003e\u003cspan class=\"ng-scope\"\u003eWhen you look in a mirror, who do you see? Not the person other people see, since our reflection in the mirror is reversed - raise your left hand, and the person in the mirror raises their right hand! From the way we part our hair to the way we smile, our faces are not symmetrical. And the image we see looking at us from the mirror is not the face we show to the world - left and right are reversed.\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eStep forward the True Mirror, which enables us to see ourselves as others see us! First patented in 1887, the True Mirror uses a combination of two mirrors, placed at right angles. In order to avoid an obvious line down the middle, the True Mirror uses front silvered mirrors, which have been made to fit together very precisely. There is a small adjustment button at the side, which you can turn to make sure the mirrors are perfectly aligned, and the join down the middle is all but invisible.\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eSeeing ourselves as others see us is unusual enough. Hold up a piece of writing to the mirror, and you can still read it - it is not reversed. Hold your left hand up to the mirror and you see in the reflection a left hand, not a right hand as you would see in a normal mirror. If you look in the mirror and lean to your left, the reflected person leans to\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cem class=\"ng-scope\"\u003etheir\u003c\/em\u003e\u003cspan class=\"ng-scope\"\u003e\u003cspan\u003e \u003c\/span\u003eleft, i.e. the other way! If you rotate the mirror by 90 degrees, you will now see yourself upside down...People have different reactions to seeing themselves for the first time in a True Mirror. Some prefer the image they see, others do not. Some find it quite disconcerting. Either way, an interesting experience! The True Mirror can be wall hung.\u003c\/span\u003e\u003cspan class=\"ng-scope\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"ng-scope\"\u003e\u003cspan\u003eMade in the USA\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Grand Illusions","offers":[{"title":"Default Title","offer_id":49287139164507,"sku":"333","price":300.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/truemirror1800x600.jpg?v=1729532277"},{"product_id":"shtox-glass","title":"Shtox Glass","description":"\u003cp\u003e\u003cspan class=\"ng-scope\"\u003eA very elegant crystal glass tumbler, handmade in Germany. However this glass tumbler has a very special trick. Place it on the table, give the glass a spin, and it keeps on spinning! Either empty, or with a drink in it, the underside is specially designed and hand finished. If you choose the glass with a spiral design, the spiral either seems to be moving up the glass or down, depending on which way you spin the glass. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"ng-scope\"\u003eMade in Germany, this was a winner of a Red Dot Design Award in 2009. An unusual present for the person who has everything. And quite a talking point! Slightly hard to describe, but the video makes it clear! These are substantial lead crystal tumblers, 98mm high. No half measures here! Each glass comes in a very smart and elegant protective tin.\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eMade in Germany\u003c\/span\u003e\u003c\/p\u003e","brand":"Grand Illusions","offers":[{"title":"Default Title","offer_id":49287197917531,"sku":"388","price":65.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/shtoxglass800x600.jpg?v=1729532850"},{"product_id":"hyperscope-kit","title":"Hyperscope Kit","description":"\u003cp\u003e\u003cspan\u003eThe Hyperscope is a viewing device that uses a system of mirrors to increase the distance between your eyes so that your eyes are as far apart as those of an antelope. This allows you to see the world in a different way, more exciting and with more depth.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eThe average eye separation is about 65mm. The Hyperscope increases this to 190 mm, i.e. by a factor of 3. As a result, your ability to detect changes in depth is enhanced by a factor of 3. By optically increasing the distance between your eyes the Hyperscope extends your vision and remaps space in new and visually exciting ways. Three dimensional space becomes bigger while objects seem smaller but more dramatic, and you will be able to appreciate three dimensional form at much greater distances. You will also notice changes in proportion: friends will have Cyrano de Bergerac noses, and if you look at your feet, they will look smaller, more remote, but somehow deeper - a kind of \"Through the Looking Glass\" experience.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eTry asking a friend to stand about 10 feet away and stretch their hand out towards you, noting that instead of their hand looking larger as you would expect, it is smaller - why? Next, test their ability to catch a ball. Most people find this difficult to do while looking through the Hyperscope, and withdraw their hands from the path the ball is following, just as they are about to catch it. There is also an intriguing difference in your eye-level, and you will realise that some complex three-dimensional structures are much clearer, easier to understand.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eThe Hyperscope can also help to clarify complicated two-dimensional images such as PDI's (Perceived Depth Images), or stereograms, the richly textured images which spring into 3D when viewed correctly, and which have become so popular. The ability to see them still eludes some people, but the Hyperscope can be used to help you see them as you are meant to. Place the image to be viewed on a suitable surface, a table or even better a wall, and looking through the Hyperscope, move towards it until double vision occurs. Move backwards and forwards until the images fuse, and the image will \"click\" into sharp relief.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003ePlease note - many people can see the effect in the Hyperscope, but it does completely depend on the viewer having full stereoscopic vision, and we have also heard that it does not always work so well if you are wearing glasses. The Hyperscope is supplied in kit form, but is easily assembled in a few minutes. No tools are required.\u003c\/span\u003e\u003c\/p\u003e","brand":"Grand Illusions","offers":[{"title":"Default Title","offer_id":49287232782683,"sku":"718","price":24.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/hyperscopekit1800x600.jpg?v=1729533625"},{"product_id":"hyperscope-pro-kit","title":"Hyperscope Pro Kit","description":"\u003cp\u003e\u003cspan class=\"ng-scope\"\u003eThis is the larger 'Pro' version, or 'big brother', of our two Hyperscope Kits.\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eThe Hyperscope is a viewing device that uses a system of mirrors to increase the distance between your eyes so that your eyes are as far apart as those of an antelope. This allows you to see the world in a different way, more exciting and with more depth.\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eThe average eye separation is about 65mm. The Hyperscope Pro increases this to 240mm. By optically increasing the distance between your eyes the Hyperscope extends your vision and remaps space in new and visually exciting ways. Three dimensional space becomes bigger while objects seem smaller but more dramatic, and you will be able to appreciate three dimensional form at much greater distances. You will also notice changes in proportion: friends will have Cyrano de Bergerac noses, and if you look at your feet, they will look smaller, more remote, but somehow deeper - a kind of \"Through the Looking Glass\" experience. Try asking a friend to stand about 10 feet away and stretch their hand out towards you, noting that instead of their hand looking larger as you would expect, it is smaller - why? Next, test their ability to catch a ball. Most people find this difficult to do while looking through the Hyperscope, and withdraw their hands from the path the ball is following, just as they are about to catch it. There is also an intriguing difference in your eye-level, and you will realise that some complex three-dimensional structures are much clearer, easier to understand.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"ng-scope\"\u003eThe Hyperscope can also help to clarify complicated two-dimensional images such as PDI's (Perceived Depth Images), or stereograms, the richly textured images which spring into 3D when viewed correctly, and which have become so popular. The ability to see them still eludes some people, but the Hyperscope can be used to help you see them as you are meant to. Place the image to be viewed on a suitable surface, a table or even better a wall, and looking through the Hyperscope, move towards it until double vision occurs. Move backwards and forwards until the images fuse, and the image will \"click\" into sharp relief.\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003ePlease note - many people can see the effect in the Hyperscope, but it does completely depend on the viewer having full stereoscopic vision, and we have also heard that it does not always work so well if you are wearing glasses. The Hyperscope is supplied in kit form, but is easily assembled in a few minutes. No tools are required. The Hyperscope Pro has a tripod fitting underneath. It includes a neck strap, and comes in smart presentation packaging. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"ng-scope\"\u003eThis Hyperscope will fill a space of 320mm x 120mm x 80mm when constructed.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"ng-scope\"\u003eMade in the UK\u003c\/span\u003e\u003c\/p\u003e","brand":"Grand Illusions","offers":[{"title":"Default Title","offer_id":49287408583003,"sku":"725","price":60.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/hyperscopeprokit1800x600.jpg?v=1729534240"},{"product_id":"three-card-box-illusion","title":"Three Card Box Illusion","description":"\u003cp\u003e\u003cspan class=\"ng-scope\"\u003eAlthough you can treat this as a magic trick, it is really an illusion, and the only trickery is happening inside your head! Our version consists of what appears to be three boxes of playing cards. Ask a volunteer to pick up all three decks, and it will feel to them that the weight of the three decks is exactly what they would expect it to be. If you then ask them to just pick up the top box of cards, they will tell you that it is heavier than all three packs put together! In fact, this is not true. It just seems to be true. And it is a very powerful illusion.\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eHow does it work?\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eWhen we pick up any kind of object, we already have some preconceived idea in our head of how much we expect it to weigh. Now these packs of cards are arranged so that the bottom two decks are filled with Styrofoam, and are extremely light. The top pack has a piece of mild steel inside, and weighs as much as three decks of cards. Now when you lift all three decks, you have an idea in your mind how much they should weigh, and that idea pretty much matches what happens when you pick them all up. However when you pick up the top pack, you are expecting it to weigh about a third of the total weight. In fact it is almost exactly the same weight as the three packs, it is just ever so slightly lighter. However because your brain is expecting it to be so much lighter, it appears that the single pack is much heavier than the three packs combined. Even when you know how it works, it still fools you!\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eThis illusion is called the Charpentier illusion, and it was discovered in 1891. So it has been fooling people for a long time! The traditional explanation said that because we expect the larger item to be heavier, we simply exert more force to lift it. However work by J. Randall Flanagan and Michael A. Beltzner at Queen's University, Ontario, Canada showed that something quite complicated is happening. They found that when people repeatedly lifted equally heavy large and small boxes, they quickly learned to exert the correct force so that they could lift each box a controlled distance, in other words their sensorimotor system could learn very quickly how heavy each box really was. However their cognitive\/perceptual parts of the brain still reported that the smaller box was heavier! So two different parts of the brain basically are thinking different things. How strange is that??\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003ehttp:\/\/psyc.queensu.ca\/~flanagan\/papers\/FlaBel_NN_00.pdf\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eIf you want to use this as a magic trick, you can make up a small box - Tim shows one labelled the 'anti-gravity box' in the video- and sit the cards on top; or you can pretend to be fiddling with magnets under the table; there are many ways you can dress this up. We supply three boxes from genuine Bicycle decks of cards. They will all be the same colour; and may either be all red boxes, or all blue ones. Two boxes are filled with Styrofoam, and are very light, the third box has a piece of mild steel inside, plus a bit of Styrofoam to stop it moving around. (we do not supply any playing cards)The magician Charlie Frye wrote a piece about this illusion in the Journal of Magic Research, Issue 6, January 2015.\u003c\/span\u003e\u003c\/p\u003e","brand":"Grand Illusions","offers":[{"title":"Default Title","offer_id":49287425786203,"sku":"733","price":35.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/threecardboxillusion800x600.jpg?v=1729534681"},{"product_id":"napiers-bones","title":"Napier's Bones","description":"\u003cdiv class=\"ng-scope\"\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cspan\u003eJohn Napier (1550-1617), discoverer of logarithms, designed this popular calculating tool known as Napier's cylindrical 'rods' or 'bones'. This calculating device allowed the user to carry out multiplication and division. \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\n\u003cspan\u003e\u003c\/span\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cspan\u003eThe 'bones' consist of a set of rectangular rods, each marked with a counting number at the top, and the multiples of that number down their lengths. When aligned against the row of multiples, any multiple of the top number can be read off from right to left by adding the digits in each parallelogram in the appropriate row. Multiplication is thus reduced to addition and the bones can also be used for division and to calculate square roots. \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\n\u003cspan\u003e\u003c\/span\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cspan\u003eA detailed instruction booklet is included. \u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Grand Illusions","offers":[{"title":"Default Title","offer_id":49294443348315,"sku":"428","price":17.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/napiersbones800x600_3344f016-3baa-4891-811a-e87e7236fdc8.jpg?v=1754056137"},{"product_id":"chinese-magic-mirror","title":"Chinese Magic Mirror","description":"\u003cdiv class=\"ng-scope\"\u003e\u003cspan\u003eShine sunlight on this apparently blank metal mirror, and the Chinese Signs of the Zodiac will appear!\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\n\u003cspan\u003e\u003c\/span\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cspan\u003e\u003cspan class=\"ng-scope\"\u003eThe mirror is made of polished bronze, and is 10cm in diameter. On the back, cast in relief, are the signs of the Chinese Zodiac. \u003cbr\u003e\u003cbr\u003eShine a bright, collimated light onto the front surface of the mirror - sunlight works brilliantly - and the pattern on the back of the mirror  will appear, projected on the wall or on any blank screen, and you will see the image of the Chinese Signs of the Zodiac.\u003cbr\u003e\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eHow is this possible? One theory says that the metal has somehow become transparent, so that the images on the back magically pass through the thickness of the mirror, and are projected from the front, mirrored side. But we don't believe that!!\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eIf you are using sunlight, then you get the picture when you project the image onto a surface that is not in direct sunlight. If you are using an artificial light source, it should be a collimated beam. An LED torch that has a single, very bright LED will also work. You will find the image greatly improved if you remove the reflector around the bulb, so that the light is coming from as small a source as possible. \u003cbr\u003e\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eA detailed paper about Magic Mirrors can be found here - https:\/\/michaelberryphysics.files.wordpress.com\/2013\/07\/berry383.pdf \u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eThe mirror comes in a woven 'Sea Wave' silk bag. These come in many different colours and patterns, and we cannot guarantee what colour bag you will get. \u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cbr\u003e\u003c\/div\u003e","brand":"Grand Illusions","offers":[{"title":"Default Title","offer_id":49294599848283,"sku":"911","price":125.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/chinesemagicmirror1800x600.jpg?v=1729609348"},{"product_id":"heliograph","title":"Heliograph","description":"\u003cp\u003e\u003cspan\u003eThe traditional signalling device...\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\n\u003cdiv\u003eThe Heliograph is basically a mirror that uses the light from the sun to flash a message across a distance, often using Morse code. They were widely used in the 19th and early 20th centuries for military and also for surveying purposes. Advanced models came with a tripod.\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eSignals could routinely be sent over distances of 30 miles or more. The equipment was light and did not need any electrical power. However anyone in or near the line of sight could potentially read the message!  Although they are no longer in common use, they are frequently supplied as part of emergency survival kits, allowing the user to signal to a distant ship or airplane. \u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eThis 4 inch metal Heliograph is light and strong, and being made of metal will not easily break. Apart from being useful in emergencies, the mirror is also useful for shaving (as soldiers have long known!) or adjusting make-up. This Heliograph is from one of the UK suppliers of emergency survival kits, and the fascinating thing for us is the simple physics involved in the aiming mechanism.\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eIf you simply use a mirror to reflect light for a short distance you will be able to see the bright reflection, and direct it where you want. However at any distance, this will not work, and an aiming mechanism is needed. \u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eThe Heliograph has a small hole in the centre of the mirror, with a series of concentric circles arranged around the hole. There is a small sighting device, attached by a piece of string, and this has a small hole in one end. The user holds the mirror up to their eye, and holds the sighting device as far away as the string will allow. Line up the hole in the sighting device with the place where you want to shine the light, and then adjust the mirror so that the small black circle caused by the viewing hole in the mirror, exactly lines up with the hole in the aiming device. You will now be shining the reflection of the sun's light in exactly the direction you have chosen. Hopefully rescue will not take too long! You will see how to aim the Heliograph in the video.\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eThe mirror is 4 inches square, and it has instructions on the reverse side.\u003c\/div\u003e\nThe traditional signalling device...\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eA 4 inch square mirror, plus a 'foresight', attached to the mirror by a cord to prevent it getting lost. \u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eThe mirror has a small hole in the centre. Hold this hole up to your eye, and hold the foresight up as far as the cord allows. Make sure you can see the target you are signalling to through the hole in the mirror and the hole in the foresight. Make sure that the mirror is adjusted so that the little black dot in the middle of the light beam - caused by the presence of the hole you are looking through - lines up with the hole in the foresight. This will make sure that the reflected beam of sunlight is aimed directly at the desired target. \u003c\/div\u003e","brand":"Grand Illusions","offers":[{"title":"Default Title","offer_id":49294757003611,"sku":"1084","price":11.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/heliograph800x600.jpg?v=1729609941"},{"product_id":"non-transitive-dice-set-1","title":"Non Transitive Dice - Set 1","description":"\u003cp\u003e\u003cspan\u003eThese so-called 'Non Transitive Dice' (Magic Dice) demonstrate a probability that violates common sense and traps the unwary.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv class=\"c-app-product-tabs__description ng-scope\" ng-if=\"ctx.description\" cs-bind-html=\"ctx.description\"\u003e\n\u003cspan class=\"ng-scope\"\u003eAn amusing new game to trick and baffle your friends, based on a recent discovery made at Stanford University, USA. These so-called 'Non Transitive Dice' (Magic Dice) demonstrate a probability that violates common sense and traps the unwary. GAME 1 Ask your opponent to select any one of the four dice. You select another and both dice are thrown, at the same time, a predetermined number of times, to see who gets the highest number on each throw, and hence wins that throw.\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eIn a game of 'The Best of Ten Throws' you will almost always have more wins. Invite the player to choose another dice - perhaps your 'winner' - leaving you to select another for yourself and play again. Again you will win. Whichever die your opponent selects, your choice, in a longer run of ten or more throws, will always win. The secret: Turn up the highest faces on each of the four dice and arrange them in a circle, as shown in the diagram.\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eProceeding clockwise around the circle, the dice with the 6's and 2's on it, called the 6-2, will beat the 5-1, the next in the circle, which in turn beats 4-0, which beats 3-3... WHICH IN TURN BEATS 6-2! Your advantage is that you will win 24 times out of 36 - that is 2 times out of 3, or a 66% advantage. So whichever dice your opponent selects - and asking someone to choose first is part of the strategy - you take the next dice backwards in the circle.\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eMade in the EU\u003c\/span\u003e\n\u003c\/div\u003e","brand":"Grand Illusions","offers":[{"title":"Default Title","offer_id":49294830272859,"sku":"33","price":9.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/nontransitivediceset1-image1800x600.jpg?v=1729676110"},{"product_id":"vogl-pfeiferl-set-of-5","title":"Vogl-Pfeiferl (Set of 4)","description":"\u003cp\u003e\u003cspan\u003eThe famous German Bird Whistle!\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv class=\"ng-scope\"\u003eThe Vogl-Pfeiferl or Bird Whistle is a small musical instrument that allows you to imitate bird calls. It is a popular item sold at fairs in Germany. \u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003eIt consists of a semi-circular piece of strong paper with a toothed edge. The membrane is held by a ring of stainless steel.\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003eTo Whistle, put the Vogl-Pfeiferl with the semi-circular edge first on the front part of your tongue. After about 2 minutes the paper should be well soaked. Then press the whistle gently against the roof of your mouth, right behind your teeth, where it should stick. Keep your mouth slightly open and blow softly with a \"Sh, sh, sh\". Your tongue should be relaxed.\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003eWhen you have acquired the basic sound technique, you can play around and experiment with various positions of your lips and tongue, your breathing and articulating vowels and consonants in order to vary sounds and imitations. \u003cbr\u003e\u003cbr\u003eThe Vogl-Pfeiferl can be dried and reused a number of times. \u003cbr\u003e\u003cbr\u003eYou will get a set of 4 Vogl-Pfeiferls.\u003c\/div\u003e","brand":"Grand Illusions","offers":[{"title":"Default Title","offer_id":49294851113307,"sku":"1043","price":11.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/vogl-pfeiferl800x600.jpg?v=1729706121"},{"product_id":"solar-photo-paper-large","title":"Solar Photo Paper (Large)","description":"\u003cdiv\u003eA very special photographic paper from the early days of photography. Just put objects or negatives on the paper and expose it to the sun light. The outlines of the objects will show up as a silhouette.\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eDeveloping and fixation with tap water and without the need of a dark chamber. Non-poisonous, made from recycled paper.\u003cbr\u003e\u003cbr\u003eInstructions in German, English, and French.\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003ePack of 10 sheets, 215 x 280 mm\u003c\/div\u003e","brand":"Grand Illusions","offers":[{"title":"Default Title","offer_id":49295155036507,"sku":"1077","price":15.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/solarphotopaper1800x600.jpg?v=1729612733"},{"product_id":"pentakis-kaleidoscope-1","title":"Camera Obscura Kit","description":"\u003cp\u003e\u003cspan class=\"ng-scope\"\u003eThis cardboard construction kit allows you to build your own camera obscura. This optical instrument is the fore-runner of the modern camera. The lens at the front is used to focus an image, via an internal mirror, onto the transparent screen at the top. By placing a sheet of tracing paper on top of this transparent screen, you can view the image clearly, and also make a tracing of the outlines of the image.\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eIn centuries gone by, artists used the camera obscura as an aid to composition. Canaletto is believed to have used the instrument, and also Vermeer. The image appears in full colour.\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eThis luxury cardboard kit contains a number of sheets of heavy duty, pre-printed, pre-punched cardboard, plus lenses and all the other pieces needed to construct a camera obscura. You will need to provide the glue.\u003c\/span\u003e\u003c\/p\u003e","brand":"Grand Illusions","offers":[{"title":"Default Title","offer_id":49295230501211,"sku":"352","price":39.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/cameraobscurakit1800x600.jpg?v=1729627547"},{"product_id":"televisor-kit","title":"Televisor Kit","description":"\u003cdiv class=\"ng-scope\"\u003eA working television, based on John Logie Baird's original - the only mechanical TV in regular production. John Logie Baird devised the first practical television in the late 1920s (he described this as a televisor).\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003eThis kit contains all the parts needed to make a televisor that works in much the same way as the original televisor and will allow you to experience TV as it was then. TV footage is encoded on a CD included in this kit. Simply plug the televisor into a CD player and play the CD to view the footage.\u003cbr\u003e\u003cbr\u003eAlternatively, if you have a computer with a 'line out' socket, you can download the stereo audio files here - https:\/\/mindsetsonline.co.uk\/shop\/televisor\/ - and play them from your computer. \u003cbr\u003e\u003cbr\u003eIt is important to mention that the device is not playing a DVD -  audio CDs have two tracks, in order to play stereo. But in this device, one audio track has the sound and the other audio track contains the images, which are decoded by the electronics in the televisor. Early experiments by the BBC in the late 1920s involved playing the televisor pictures and sound from the transmitters normally used for radio. There were no television transmitters until 1936. \u003cbr\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003eApproximate size: 260 x 195 x 70mm.\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003eRequires 4 x AA size batteries, plus a CD player.\u003c\/div\u003e","brand":"Grand Illusions","offers":[{"title":"Default Title","offer_id":49301169865051,"sku":"811","price":90.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/televisorkit800x600.jpg?v=1729675476"},{"product_id":"non-transitive-dice-set-2","title":"Non Transitive Dice - Set 2","description":"\u003cdiv class=\"c-app-product-tabs__description ng-scope\" cs-bind-html=\"ctx.description\" ng-if=\"ctx.description\"\u003e\n\u003cspan class=\"ng-scope\"\u003eAnother variation on Non Transitive Dice, this time based on a set of three dice. The number combinations are 1, 4, 4, 4, 4, 4; 3, 3, 3, 3, 3, 6; and 2, 2, 2, 5, 5, 5. In this case, the first die beats the second in 25 out of 36 possibilities, the second beats the third in 21 out of 36 chances, and the third beats the first in 21 out of 36 tries.\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eMichael Phillips writes to point out that Bradley Efron designed some further sets of Non Transitive Dice, including 2,3,3,9,10,110,1,7,8,8,85,5,6,6,6,6,4,4,4,4,12,12and1,2,3,9,10,110,1,7,8,8,95,5,6,6,7,73,4,4,5,11,12\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eThanks for this, Michael\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eThese dice are unique to Grand Illusions\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eMade in UK\u003c\/span\u003e\n\u003c\/div\u003e","brand":"Grand Illusions","offers":[{"title":"Default Title","offer_id":49301247983963,"sku":"34","price":8.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/nontransitivediceset2800x600.jpg?v=1729677046"},{"product_id":"flippe-top","title":"Flippe Top","description":"\u003cdiv\u003eA spherical Tippe Top which flips over... and over...and over...\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eA regular Tippe Top does something unexpected, because when it flips, the centre of gravity moves upwards. \u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eThe Flippe Top takes this a step further. Inside the spherical top is a ball bearing, within a channel. Spin the top and when the ball bearing is at the bottom of the channel, the Flippe Top behaves like a Tippe Top, and inverts. \u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eHowever the ball bearing is now at the top of the channel, and due to gravity, it falls to the bottom of the channel. So... the Flippe Top inverts again, and so the process goes on. 4 or 5 inversions are fairly common, and it is possible to get even more. \u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eThis top is 3D printed in two colours so that you can see it flip. It is glued together and does not come apart. You will get one Flippe Top, with two random colours. \u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eThe top is 3.75 cm in diameter and weighs 16 g (1\/2 ounce).\u003c\/div\u003e","brand":"Grand Illusions","offers":[{"title":"Default Title","offer_id":49301693399387,"sku":"1012","price":17.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/flippetop1800x600.jpg?v=1729682180"},{"product_id":"ring-dial","title":"Ring Dial","description":"\u003cp\u003e\u003cspan class=\"ng-scope\"\u003e\u003cspan\u003eA Ring Dial was a cutting edge scientific instrument in its time, which is about 500 years ago!\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"ng-scope\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"ng-scope\"\u003eA Ring Dial - or two-ring universal equinoctial ring dial to give it its full name - was a cutting edge scientific instrument in its time, which is about 500 years ago! Essentially it is a type of sundial that allows you to tell the time wherever you are, so long as the sun is shining. Originally developed in the early 17th century by the English mathematician William Oughtred, it was a development of an earlier instrument, the astronomer's ring, which was used for measuring the altitude of stars and also terrestrial objects.\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eYou need to know your latitude, so this is the first adjustment that you need to make.\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eSecondly you need to set the date using the sliding section in the middle.\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eThen you rotate the inner ring until it won't turn any more. Suspend the ring dial by the cord, such that the sun shines through the pinhole in the middle, and hits the centre of the inner ring. From here you can read off the time. When you have finished, you can fold the ring dial flat again. The ring dial does not allow for the 1 hour change in summer time, so you need to factor that in to your calculations. It can work in any latitude from 20 degrees to 75 degrees, in either hemisphere. What is clever is that, unlike a normal sundial that needs to be aligned and requires you to know the exact direction of north, the ring dial does not need this information.\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eNeeds no batteries!\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eThis modern replica is made of solid brass, and comes in a small cardboard presentation box, together with instructions. The dial is 6cm across.\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eMade in EU\u003c\/span\u003e\u003c\/p\u003e","brand":"Grand Illusions","offers":[{"title":"Default Title","offer_id":49301894496603,"sku":"113","price":55.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/ringdial1800x600.jpg?v=1729686458"},{"product_id":"solids-of-constant-width","title":"Solids of Constant Width","description":"\u003cp\u003e\u003cspan class=\"ng-scope\"\u003e\u003cspan\u003eWhichever way you roll them, their width is always the same, although they are not spheres!\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"ng-scope\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"ng-scope\"\u003eA set of 3 solids of constant width, made from solid aluminium, with a width of 35mm. These mathematical curiosities have some intriguing properties. For example, if you place the set of 3 solids on a flat surface and place a book on top of them, you will be able to slide the book in any direction completely smoothly, without any up or down movement. Onlookers might think that only 3 spheres would be able to do this, but solids of constant width can behave in the same way. Whichever way you roll them, their width is always the same. See this article on Solids of Constant Width, called\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003ca class=\"ng-scope\" href=\"http:\/\/www.mi.uni-koeln.de\/mi\/Forschung\/Kawohl\/kawohl\/pub100.pdf\"\u003eMeissner's Mysterious Bodies,\u003c\/a\u003e\u003cspan class=\"ng-scope\"\u003e\u003cspan\u003e \u003c\/span\u003ewritten by Bernd Kawohl and Christof Weber. It was originally written in June 2011, and published in the professional mathematics journal The Mathematical Intelligencer. Included - a set of 3 identical solids of constant width, turned from solid aluminium, with a width of 35mm.\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eMade in UK\u003c\/span\u003e\u003c\/p\u003e","brand":"Grand Illusions","offers":[{"title":"Default Title","offer_id":49302083469659,"sku":"364","price":45.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/solidsofconstantwidth1800x600.jpg?v=1729699334"},{"product_id":"dudeneys-dissection","title":"Dudeney's Dissection","description":"\u003cp\u003e\u003cspan class=\"ng-scope\"\u003e\u003cspan\u003eA beautiful physical version of Dudeney's Dissection, where the 4 pieces are hinged, so that you can transform one shape into the other.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"ng-scope\"\u003eHenry Ernest Dudeney (1857-1930) was one of the greatest 19th century puzzlers, and in 1902 he posed a problem in his column in the newspaper\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cem class=\"ng-scope\"\u003eThe Weekly Dispatch.\u003cspan\u003e \u003c\/span\u003e\u003c\/em\u003e\u003cspan class=\"ng-scope\"\u003eThe problem was 'starting with an equilateral triangle, what is the minimum number of pieces you can cut the triangle into, so that the pieces can be rearranged into a square?'\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eMany readers wrote in, giving a solution that involved 5 pieces. However one person, a Mr C McElroy of Manchester, sent in a solution involving only 4 pieces. Interestingly, it appears that there is some doubt as to whether Henry Dudeney actually knew of the 4 piece solution at the time he wrote his original newspaper column! He subsequently included this problem in a book published in 1907 called\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cem class=\"ng-scope\"\u003eThe Canterbury Puzzles\u003c\/em\u003e\u003cspan class=\"ng-scope\"\u003e, where he called it the haberdasher's problem. However it is more commonly known as Dudeney's Dissection.\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eWe are very pleased to be able to offer this beautiful physical version of Dudeney's Dissection, where the 4 pieces are hinged, so that you can transform one shape into the other. Created specially for us by a local engineering company, the 4 pieces are made on a CNC lathe from solid aluminium, which is subsequently anodized. The equilateral triangle has sides of length 15cm, while the square has sides of length 10cm. It is 9mm thick, and weighs about 250g.\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eMade in UK\u003c\/span\u003e\u003c\/p\u003e","brand":"Grand Illusions","offers":[{"title":"Default Title","offer_id":49304208867675,"sku":"392","price":125.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/dudeneys_dissection5800x600.jpg?v=1729699635"},{"product_id":"15-note-music-box-set","title":"15 Note Music Box Set","description":"\u003cp\u003e\u003cspan class=\"ng-scope\"\u003eWe remember this charming little toy from years ago, and are proud to be able to present it here once more. Traditional musical boxes normally have a single tune (unless you have an advanced version with different cylinders). But in this case, the music box, which is hand cranked, has a strip of paper that passes through it, and the little holes in this strip determine the tune. The Music Box comes with one strip of paper already punched with the tune 'Brahms Lullaby'. There are then 2 blank strips of paper and a hole punch, which will allow you to create tunes of your own! It makes for a fun and interactive way to learn and create music. The Music Box has a two octave range, and can play chords, not just single notes. The set consists of the Paper Strip Music Box, a Hole Punch, one sample strip of paper with 'Brahms Lullaby' already punched, and 2 Blank Melody Strip Cards. The Melody Strips are 48cm long, and 4cm wide. The Music Box is 10.5cm (including handle) x 4.5cm x 2.75cm high. Further blank strips are available.\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eHOLE PUNCH - we were never very keen on the old, metal hole punchers. They were a bit uncomfortable to use. We now supply the new version of hole punch - it looks a little bit like a small stapler, and has a plastic top. We find these a lot easier to use, and more accurate. \u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eAs well as a fun way to learn about music, there are also some serious musicians out there who are using the music box, including Hannah Peel. There is also an app that has been written that allows you to test out new songs and compositions, and when you are happy with the result, you can print out a guide to help you punch out the paper strip. \u003c\/span\u003e\u003ca href=\"http:\/\/www.grand-illusions.com\/acatalog\/Composing-for-the-Grand-Illusions-Music-Box-605.html\" class=\"ng-scope\"\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/a\u003e\u003cspan class=\"ng-scope\"\u003eMade in China\u003c\/span\u003e\u003c\/p\u003e","brand":"Grand Illusions","offers":[{"title":"Default Title","offer_id":49305027936603,"sku":"13","price":17.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/15notemusicboxset1800x600.jpg?v=1729707646"},{"product_id":"10-blank-paper-strips-for-the-15-note-music-box-set","title":"10 Blank Paper Strips for the 15 Note Music Box Set","description":"\u003cp\u003e\u003cspan\u003e10 Blank Strips for the 15 Note Music Box Set.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eHandy if you want to create lots of different tunes, or if you need to join several strips together in order to be able to make longer compositions. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Grand Illusions","offers":[{"title":"Default Title","offer_id":49305079316827,"sku":"97","price":12.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/10BlankPaperStripsforthe15NoteMusicBoxSet800x600.jpg?v=1729708193"},{"product_id":"20-note-music-box-set","title":"20 Note Music Box Set","description":"\u003cp\u003e\u003cspan\u003e\u003cspan class=\"ng-scope\"\u003eThis is the 'big brother' version of the 15 Note Music Box Set. It has 20 notes instead of 15, so it can play 2.5 octaves.\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eAs a music box, it is quite a bit bigger, at 14.5 x 7 x 2.75cm high. Again, like the smaller music box, it just plays the white notes, and does not play sharps or flats. Included is the Music Box, one pre-punched strip which plays Romeo and Juliet, 2 blank strips, and a hole punch, so that you can create your own tunes! The strips are 66 x 7cm. We can also supply more blank strips.\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eAs well as a fun way to learn about music, there are also some serious musicians out there who are using the music box, including Hannah Peel. There is also an app that has been written that allows you to test out new songs and compositions, and when you are happy with the result, you can print out a guide to help you punch out the paper strip. Search online for Jelly Biscuits.\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eHere is a video tutorial that will help you create the music strips - https:\/\/youtu.be\/HjBhO9iqEc0\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr\u003eHOLE PUNCH - we were never very keen on the old, metal hole punchers. They were a bit uncomfortable to use. We now supply the new version of hole punch - it looks a little bit like a small stapler, and has a plastic top. We find these a lot easier to use, and more accurate. \u003cbr\u003e\u003cbr\u003ePlease note some of the hole punches are green and some are black.\u003cbr\u003e\u003cbr\u003e\u003cspan class=\"ng-scope\"\u003eMade in China\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Grand Illusions","offers":[{"title":"Default Title","offer_id":49305296077147,"sku":"96","price":29.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/20NoteMusicBoxSet800x600.jpg?v=1729710413"},{"product_id":"10-blank-strips-for-the-20-note-music-box-set","title":"10 Blank Strips for the 30 Note Music Box Set","description":"\u003cp\u003e\u003cspan\u003e10 Blank Strips for the 30 Note Music Box Set\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eHandy if you want to create lots of different tunes, or if you need to join several strips together in order to be able to make longer compositions. \u003c\/span\u003e\u003c\/p\u003e","brand":"Grand Illusions","offers":[{"title":"Default Title","offer_id":49305440649563,"sku":"556","price":21.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/10blankpaperstripsforthe30notemusicbox.jpg?v=1729714992"},{"product_id":"winding-mechanism-for-20-note-music-box","title":"Winding Mechanism For The 20 Note Music Box","description":"\u003cp\u003eIf the gears on your music box become worn or damaged, you can simply replace the winding mechanism. There are two small screws holding it in place. Once these are removed, you can simply swap the new winding mechanism for the old one, and then use the same two screws to fix the new mechanism in place. \u003c\/p\u003e","brand":"Grand Illusions","offers":[{"title":"Default Title","offer_id":49305516245339,"sku":"1001","price":3.99,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/windingmechanism800x600.jpg?v=1729713053"},{"product_id":"winding-mechanism-for-the-30-note-music-box","title":"Winding Mechanism For The 30 Note Music Box","description":"\u003cp\u003eIf the gears on your music box become worn or damaged, you can simply replace the winding mechanism. There are two small screws holding it in place. Once these are removed, you can simply swap the new winding mechanism for the old one, and then use the same two screws to fix the new mechanism in place. \u003c\/p\u003e","brand":"Grand Illusions","offers":[{"title":"Default Title","offer_id":49305809158491,"sku":"1002","price":3.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/windingmechanism800x600_0cfde6f6-c3ad-40f5-8f2f-6a05c9b08c5b.jpg?v=1729714502"},{"product_id":"10-blank-strips-for-the-20-note-music-box-set-1","title":"10 Blank Strips for the 20 Note Music Box Set","description":"\u003cp\u003e\u003cspan\u003e10 Blank Strips for the 30 Note Music Box Set\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eHandy if you want to create lots of different tunes, or if you need to join several strips together in order to be able to make longer compositions. \u003c\/span\u003e\u003c\/p\u003e","brand":"Grand Illusions","offers":[{"title":"Default Title","offer_id":49305955696987,"sku":"142","price":14.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/10BlankStripsforthe20NoteMusicBoxSet800x600_184a3f78-d7da-4f50-95d7-abd1bd7cebe1.jpg?v=1729715097"},{"product_id":"30-note-music-box-set","title":"30 Note Music Box Set","description":"\u003cp\u003e\u003cspan\u003eWe are delighted to be able to announce the 30 Note Music Box Set. This music box has a range of just over 3 octaves, but in addition it plays a scale that is mostly chromatic. This expands the musical possibilities enormously, since this new music box can now play sharps and flats. The new music box takes paper strips that are physically the same size as those used in the large music box set. However they have been printed differently, due to the availability of the extra notes.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eThe 30 Note Music Box Set comes in a plain white box. Inside the box is the Music Box itself, one pre punched strip which plays the theme from Swan Lake, one blank strip, and a hole punch. The Music Box weighs 280 grams, and is 108 mm wide (150 mm wide including the handle), 70 mm deep, and 30 mm high. When packed in the box, with the hole punch and blank strips, the weight is just over 400 grams. There is an important point to make, if you are planning to combine the music box with other instruments. The notes that are marked on the paper strip, i.e. G, A, C, are NOT the notes that the music box actually plays, if you compare it with the notes on a piano. So the line marked F# on the music box plays back as a B, G# plays as a C#, etc. As well as a fun way to learn about music, there are also some serious musicians out there who are using the music box, including Hannah Peel. There is also an app that has been written that allows you to test out new songs and compositions, and when you are happy with the result, you can print out a guide to help you punch out the paper strip.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eHOLE PUNCH - we were never very keen on the old, metal hole punchers. They were a bit uncomfortable to use. We now supply the new version of hole punch - it looks a little bit like a small stapler, and has a plastic top. We find these a lot easier to use, and more accurate. \u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Grand Illusions","offers":[{"title":"Default Title","offer_id":49305984663899,"sku":"554","price":42.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/30notemusicboxset1800x600.jpg?v=1729715569"},{"product_id":"flux-original","title":"Flux Original","description":"\u003cp\u003e\u003cspan class=\"ng-scope\"\u003eWith its gravity-defying effect, this is a scientific toy that feels like magic!\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eDrop the ultra-strong magnetic ball inside the copper tube, and experience just how slowly the ball falls. Although the ball is not touching the sides of the copper tube, you can still feel the weight of the magnetic ball within the tube. How does it work? The scientific principle is called Lenz's Law. Basically the movement of the falling magnetic ball creates a changing magnetic field inside the metal wall of the tube; according to Faraday's law of induction, the changing magnetic field induces a voltage inside the wall of the tube called electromotive force. Because the tube is made of metal that is a good conductor, this voltage creates electric currents that flow round the walls of the tube - these are called eddy currents. According to the law of excitation, the flowing eddy currents generate a second magnetic field that can affect the magnetic field of the ball. Lenz's law states that this additional magnetic field is always directed to oppose the motion that has generated it : the downward movement of the ball; and the faster the motion, the stronger the slowing force becomes. Flux Original uses ultra high purity copper, in order to give the strongest effect.\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eThe tube is 60mm high and 50mm wide. There is a graphite grey suede leather band around the Flux Original, to provide a firm hand grip. It comes in a smart presentation box, and includes a desk stand.\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eSAFETY\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"ng-scope\"\u003eThis item is not suitable for children under the age of 14 years. The Flux Original includes a very strong neodymium magnetic ball that should be handled with care. Avoid dropping it on hard surfaces, or it may shatter. It should be kept away from watches, computers and phones, and should not be swallowed.\u003c\/span\u003e\u003c\/p\u003e","brand":"Grand Illusions","offers":[{"title":"Default Title","offer_id":49308934635867,"sku":"740","price":100.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/fluxoriginal1800x600.jpg?v=1729759302"},{"product_id":"magic-penny-kit","title":"Magic Penny Kit","description":"\u003cp\u003e\u003cspan class=\"ng-scope\"\u003e\u003cspan\u003eWith Magic Penny Magnets and some everyday objects, you can perform feats that even top scientists and engineers have found amazing!\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"ng-scope\"\u003e\u003cspan\u003eSponsored by Brunel University, The Institute of Physics and The Royal Institution in London, this is the expanded 5th Edition of the Magic Penny Magnet Kit. The smart presentation box contains\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e- 2 super strong magnets encased in stainless steel\u003cbr class=\"ng-scope\"\u003e- 35 custom coins\u003cbr class=\"ng-scope\"\u003e- An activity booklet packed with 46 investigations, plus further magnet facts.\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003eBalance 4 coins on the edge of a glass, spin pennies at 1,000 revolutions per minute, build gravity-defying sculptures and levitating pyramids, magically move pennies up ramps, over bridges and along tightropes!\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003eWith Magic Penny Magnets and some everyday objects, you can perform feats that even top scientists and engineers have found amazing. \u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003eSuggested Age 8+. \u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"ng-scope\"\u003e\u003cspan\u003eAdult supervision is recommended.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Grand Illusions","offers":[{"title":"Default Title","offer_id":49310032363867,"sku":"693","price":49.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/magicpennykit800x600.jpg?v=1729764568"},{"product_id":"3d-compass","title":"3D Compass","description":"\u003cdiv\u003eIf you ask most people to point North, they would point in the direction that a normal compass would point, i.e. the direction you would need to take along the surface of the earth in order to get to the North Pole. However, you also need to point down into the ground, in order to indicate the direction of the magnetic North Pole; and of course the angle that you need to point down will depend on your latitude. \u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eThe 3D Compass is a clever little device that follows the earth's magnetic field in three dimensions. It shows what a 2D compass does not - the inclination of the field!\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eThe compass is made from Neodymium magnets, encased in a domed glass housing. \u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eMade in the UK\u003c\/div\u003e","brand":"Grand Illusions","offers":[{"title":"Default Title","offer_id":49310859919707,"sku":"917","price":25.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/3dcompass.jpg?v=1729767233"},{"product_id":"skill-flux","title":"Skill Flux","description":"\u003cp\u003e\u003cspan\u003eSkill Flux uses ultra high purity aluminium. The magnetic ball moves faster through the aluminium tube that it would through copper, so these faster dynamics enable you to perform a range of challenging tricks.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cspan class=\"ng-scope\"\u003eDrop the ultra-strong magnetic ball inside the aluminium tube, and experience just how slowly the ball falls. Although the ball is not touching the sides of the tube, you can still feel the weight of the magnetic ball within the tube. With it's gravity-defying effect, this is a scientific toy that feels like magic!\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eHow does it work?\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eThe scientific principle is called Lenz's Law. Basically the movement of the falling magnetic ball creates a changing magnetic field inside the metal wall of the tube; according to Faraday's law of induction, the changing magnetic field induces a voltage inside the wall of the tube called electromotive force. Because the tube is made of metal that is a good conductor, this voltage creates electric currents that flow round the walls of the tube - these are called eddy currents. According to the law of excitation, the flowing eddy currents generate a second magnetic field that can affect the magnetic field of the ball. Lenz's law states that this additional magnetic field is always directed to oppose the motion that has generated it : the downward movement of the ball; and the faster the motion, the stronger the slowing force becomes. Skill Flux uses ultra high purity aluminium. The magnetic ball moves faster through the aluminium tube that it would through copper, so these faster dynamics enable you to perform a range of challenging tricks. There is a deep red suede leather band around the Skill Flux, to provide a firm hand grip. It comes in a smart presentation box.\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eFor some of the tricks that can be performed, see https:\/\/youtu.be\/EZlVfeu_GOE\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eSAFETY\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003cspan class=\"ng-scope\"\u003eThis item is not suitable for children under the age of 14 years. The Skill Flux includes a very strong neodymium magnetic ball that should be handled with care. Avoid dropping it on hard surfaces, or it may shatter. It should be kept away from watches, computers and phones, and should not be swallowed.\u003c\/span\u003e\u003cbr class=\"ng-scope\"\u003e\u003cbr class=\"ng-scope\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv class=\"ng-scope\"\u003eIn the box:\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003eOne tube of Skill Flux\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003eOne neodymium magnet ball \u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003eLinen carrying pouch\u003c\/div\u003e\n\u003cdiv class=\"ng-scope\"\u003eEnglish user manual\u003c\/div\u003e","brand":"Grand Illusions","offers":[{"title":"Default Title","offer_id":49311077007707,"sku":"741","price":45.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0881\/4018\/5947\/files\/skillflux1800x600.jpg?v=1729767877"}],"url":"https:\/\/www.grand-illusions.com\/collections\/all-products.oembed?page=13","provider":"Grand Illusions","version":"1.0","type":"link"}