Innovative Kids Green Start Chunky Wooden Puzzles: Silly Squares Puzzle Packaged in a reusable carry-along storage case, these Earth-friendly puzzles are made with wood from sustainable forests. Chunky, raised pieces support basic grasping skills, combined with slight gradations of cognitive challenge. Created with the help of child development experts, green start wooden puzzles exercise skills that prepare children for reading, math, problem solving, and more. Each puzzle in this level reinforces a different developmental skill. A fun double-decker bus contains six square windows of the same size and shape that can fit into any of the spots but need to be rotated so the animals face right side up. Border of each piece matches color inside well.