08.16.2011
Geek Toys : Pentominoes 3D Puzzle Cubes
An awesome 3D mathematical puzzle. Arthur C. Clarke loved Pentominoes! Like real world Tetris, Pentominoes are polyominoes made up of five same-size squares, each connected to each other along an edge. These Pentominoes blow that into 3D, for even more puzzle-solving mathematical fun. $16.99