The Cube is symbolically related with the artificial and the constructional.
A Cube is a severely pixilated sphere
A Cube is a 4 dimensional square;
A Cube is 6 squares touching teach other as little as possible
A Cube is a lo-res sphere
A Cube is a sphere with all the roundy bits lopped off
A Cube is a sharp ball.
A Cube is a thick square
Cube, all 10 cards.