Resources by Grand Illusions Ltd
Displaying 1 - 3 of 3
These unusual spinning tops consist of a metal disc, and an off-set sphere made from either plastic or wood. Stand the top on edge and spin it on any flat surface, and the...
A Klein bottle is a non-orientable surface, where there is no distinction between inside and outside. So unlike a sphere, where you cannot pass from the outside to the inside without passing through the surface, in a...