Here's a fun way to build vocabulary and classification skills The 20 self-checking, 5-piece puzzles in the set are designed to help children develop vocabulary and to gain a better understanding of how objects or animals are classified. Each puzzle is unique--great for self-checking--and features a category at the center and four matching picture/word puzzle pieces Start building a foundation for academic success with the Learning Puzzles: Classifying set. For use with Grades PreK-1.