Begin learning early math with the Melissa & DougⓇ Number Sound Puzzle. Unique, this puzzle will say the correct name of each number when the piece is placed in the correct spot on the board. For best results, use in a brightly-lit room to activate the puzzle's light-activated sensors to help make the sounds. Each piece slightly raises above the puzzle board for easy-grasping. A colorful picture on the bottom of the puzzle pieces teaches counting and reinforces the relationship between numbers and their sounds. Made of wood for top-quality durability. Measures 0.8" tall x 10" long x 13.5" wide. Requires AAA batteries (not included). For children ages 3 years and older.