HIGH QUALITY CONSTRUCTION: Durable wood puzzle pieces trigger piano notes THICK CHUNKY PIECES: Perfect for little hands and help build dexterity skills. EDUCATIONAL AND FUN: Puzzles are an excellent learning tool that help children develop cognitive skills like color and pattern recognition, hand-eye coordination, matching, and more. Recommended for ages 3 and up. Requires two AAA batteries (not included) Includes: Puzzle Sound Board, 5 Puzzle Pieces Big, chunky pieces fit securely into board spaces, triggering piano notes. Sound puzzles provide a fun, engaging way for children to learn shape and sound recognition. Best of all, they get to hear the songs they love over and over again. Requires two AAA batteries (not included).