Err

Where science meets magic and fun meets education!

Maths Toys

Geobender Cube "Nautilus"
GeoBender is an elegant and sophisticated 3D magnetic puzzle...
29.00
Magic Cube
An elegant, transforming geometric puzzle. Based on the Yoshimoto Cube, which we used to sell about 20 years ago!
9.99
(-20.02%)  7.99
Non Transitive Dice - Set 1
These so-called 'Non Transitive Dice' (Magic Dice) demonstrate a probability that violates common sense and traps the unwary.
3.99
Non Transitive Dice - Set 2
Another variation on Non Transitive Dice, this time based on a set of three dice.
3.99
Sicherman Dice
An unusual pair of dice. Martin Gardner reported on the discovery of these dice by a certain Colonel George Sicherman, of Buffalo, New York, in a...
3.99
Educated Monkey
A really charming tin toy this one. We like it a lot!
13.99
Solids of Constant Width
A set of 3 solids of constant width, made from solid aluminium, with a width of 35mm. Whichever way you roll them, their width is always the same!
29.99
Dudeney's Dissection
We are very proud to be able to offer this beautiful physical version of Dudeney's Dissection, where the 4 pieces are hinged, so that you can...
110.00
Napiers Bones
'Napier's Bones' is an early calculating device that allowed the user to carry out multiplication and division.
22.99
Tangram
The tangram consists of seven flat shapes, called tans, which are put together to form shapes. This ancient puzzle originated in China, and was...
10.00
Hypnogizmo
It is not that these beads are hyperactive, rather that they trace out the shape of a hyperboloid! 
16.80