Wooden Sound Puzzle: See & Hear AlphabetDetails: See and hear the alphabet with this 26 piece wooden Alphabet Sound Puzzle with brightly colored uppercase letters 10" x 13. 5" x 0. 8" sturdy wooden puzzle board (AAA batteries required, not included) Pictures under pieces for easy matching and enhanced learning opportunities; letters sit slightly above the puzzle board for easy grasping TIP: Puzzle has light activated sensors; for best results, expose the sensor by removing a piece in a