This is the second revision of the extremely educational 2 Cycle Aircraft Engine Model! All the parts are included so that you can build your own ...

Includes basic joined together nuggetsof most efficient space filling volume- Weaire-Phelan structure. Mount several of these together to build lar...

Background information:http://en.wikipedia.org/wiki/Penrose_tiles You need the 13 skinny rhombs too (preferably in an other color) to have a compl...

Background information:http://en.wikipedia.org/wiki/Penrose_tiles You need the 21 fat rhombs too (preferably in an other color) to have a complete...

Using 30 standard-sized pencils, and this kit, you can create an icosahedron-shaped object of about 38 cm or 15 inch in diameter. Use it as a cool ...

A to-scale model of the solar system, perfect for any mad scientist's desktop! Includes all 8 planets, their planetary-massed moons, the 5 official...