Err

Where science meets magic and fun meets education!

Maths Toys

Golden Mean Ratio Compass
The Golden Ratio has inspired thinkers of all disciplines...
£ 14.99
Pentakis Kaleidoscope
A three-sided mirror kaleidoscope with a fivefold symmetry axis
£ 25.00
Pyraminx
Pyraminx - the original 'twisty' puzzle!
£ 14.99
Crystal Pyraminx
The original king of twisty puzzles, now in crystal!
£ 18.99
Hollow Pyraminx
Uwe Mèffert's Hollow Pyraminx
£ 15.99
Peano Curve Fractal Puzzle
A puzzle based on space filling fractal curves
£ 25.00
Flippe Top
This Tippe Top has an unexpected extra trick...
£ 12.99
Chichen Itza - a symmetry puzzle
For dedicated fidgeters only! What a joy only three pieces can bring to idle hands...
£ 7.99
Broken Twig - a symmetry puzzle
Rearrange the custom metal "twigs” until they form a symmetrical shape.
£ 7.99
The Chimera - a symmetry puzzle
Two metal pieces, limitless possibilities of arranging them, but only one solution! 
£ 7.99
Stem Lab - PENDULUM
The Pendulum kit is designed to serve as a learning tool rather than a puzzle...
£ 15.99
Geobender Cube "Abstract-2"
Abstract-2 - a new design of the GeoBender magnetic puzzle...
£ 24.00
Geobender Cube "Bees"
Bees - a new design of the GeoBender magnetic puzzle...
£ 24.00
Geobender Cube "Surfer"
The GeoBender is a new design of magnetic puzzle...
£ 24.00
Geobender Cube "Nautilus"
GeoBender is an elegant and sophisticated 3D magnetic puzzle...
£ 24.00
Magic Cube
An elegant, transforming geometric puzzle, based on the Yoshimoto Cube.
£ 9.99
Ring Dial
A Ring Dial was a cutting edge scientific instrument in its time, which is about 500 years ago!
£ 43.00
Non Transitive Dice - Set 1
These so-called 'Non Transitive Dice' (Magic Dice) demonstrate a probability that violates common sense and traps the unwary.
£ 4.99
Non Transitive Dice - Set 2
Another variation on Non Transitive Dice, this time based on a set of three dice.
£ 4.99
Educated Monkey
A really charming tin toy this one. We like it a lot!
£ 19.99
Solids of Constant Width
Whichever way you roll them, their width is always the same, although they are not spheres!
£ 34.99
Dudeney's Dissection
A beautiful physical version of Dudeney's Dissection, where the 4 pieces are hinged, so that you can transform one shape into the other.
£ 110.00
Napiers Bones
'Napier's Bones' is an early calculating device that allowed the user to carry out multiplication and division.
£ 24.99