In this puzzle, the pieces are slightly raised above the board for easy grasping. The colorful pictures underneath each piece help teach counting and reinforce the relationship between quantities and numerals. This educational puzzle has lots of ways to. "Hear the numbers" with this light activated puzzle. 21-piece wooden puzzle. Contains Small Parts, AAA Batteries Not Included. Melissa & Doug Numbers Sound Puzzle is a 21-piece wooden sound puzzle that pronounces the name of each number when its piece is placed correctly.