Melissa & Doug Self-Correcting Wooden Number Puzzles With Storage Box (40 Pcs)Product Description 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 At The Same Time. These Wooden Number Puzzles Are An Exceptional Way For Parents And Older Kids To Engage And Interact With Kids. Parents Can Play Multiple Entertaining Games Such As Story Time,