Place the 3-D puzzle pieces to form 3-D structures. The soma cube is made of 7 pieces each of which is made of 3 or 4 cubes. The basic puzzle is to form a 5×5 cube from the 7 pieces. Block by Block comes with 60 cards of extra challenges to face. Clues will help you build the given structure even when you might feel stumped. The whole family can work on their spatial skills as they actually see and feel the pieces and then finally move the soma cube pieces from place to place. Soma Cube – Colorful Puzzle Cube is a wooden version of the original cube puzzle without the extra puzzles.