Soma Cube Puzzle Set - With Challenge CardsBuild shapes with seven wooden pieces. Includes 50 challenge cards in easy, medium, and hard levels. Offers engaging challenges that grow with skill. Use all seven pieces to form new 3D shapes each time. Solutions are printed on the back of every card. Invented by Piet Hein in 1933 and enjoyed for decades. Original goal is a 3x3x3 cube with many possible solutions. Boosts spatial reasoning, patience, and problem solving. Stored in a handcrafted wooden
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