Piaget Cognitive Development online puzzle

2x4 - 8 pieces4x7 - 28 pieces5x9 - 45 pieces6x11 - 66 pieces7x12 - 84 pieces8x13 - 104 pieces9x15 - 135 pieces9x16 - 144 pieces11x19 - 209 pieces17x29 - 493 pieces Start a new game

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