Knowing how to identify numbers and their values is one of the foundations of learning. You can help your child learn his numbers while having tons of fun with this set of Self-Correcting Number Puzzles! Each wooden puzzle comes with two pieces: One side of the puzzle features a numeral from 1-20, and the other features full-color pictures objects and items in a corresponding quantity. Not only will your child learn numbers, but by completing puzzles he'll also strengthen his cognitive abilities and short term memory. They're perfect for playtime alone with their self-correcting nature; your little one won't be able to match wrong pieces together! These wooden pieces come in their own storage box to help keep them from getting lost. It is recommended for children ages 4 and up, and measures 5.75 x 13.75 x 3 packaged.