Err

Where science meets magic and fun meets education!

Maths Toys

Non Transitive Dice - Set 1
These so-called 'Non Transitive Dice' (Magic Dice) demonstrate a probability that violates common sense and traps the unwary.
6.99
Non Transitive Dice - Set 2
Another variation on Non Transitive Dice, this time based on a set of three dice.
6.99
Pentakis Kaleidoscope
A three-sided mirror kaleidoscope with a fivefold symmetry axis
25.00
Flippe Top
This Tippe Top has an unexpected extra trick...
14.99
Ring Dial
A Ring Dial was a cutting edge scientific instrument in its time, which is about 500 years ago!
48.00
Tippe Top
If you spin it fast enough, it will turn completely upside down, spinning on its stem.
19.99
Solids of Constant Width
Whichever way you roll them, their width is always the same, although they are not spheres!
39.99
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.
120.00
Napiers Bones
'Napier's Bones' is an early calculating device that allowed the user to carry out multiplication and division.
27.99