Innovative Kids Green Start Chunky Wooden Puzzles: Big And Little 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. Each fun animal piece is the same shape, but four are large and four are small. Kids can match the big pieces with the little pieces or mix them up to make different pairs or patterns.