Description: Match these wooden puzzle pairs to make mastering numbers and letters as easy as 1, 2, 3. The puzzles are self-correcting each piece has only one match that fits, so children can play independently and learn at the same time. Match these wooden puzzle pairs to make mastering numbers as easy as 1, 2, 3. Groups of objects illustrate numbers 1-20, and the puzzles are self-correcting each piece has only one match that fits, so children can play independently and learn all the while. Specifications: - Age Range: 4 Years and up What's in the box Self-Correcting Letter & Number Puzzles