People can't resist picking up the Molecube and giving it a spin. A mix between a Rubik's cube and a Sudoku puzzle, Molecube is extremely fun to play and hard to solve. The 54 colored balls come in nine different colors and the goal is to arrange the cube so that each of the six sides displays one ball of every color. A pleasant clicking sound and smooth mixing action make the Molecube hard to put down. A colorful conversation piece for any home or office.