Thick, wooden puzzle pieces trigger the popular Baby Shark Song Features Mommy Shark, Daddy Shark, Grandma Shark, Grandpa Shark, and, of course, Baby Shark Fun way for children to learn shape and sound recognition Requires two AAA batteries (not included) Puzzle sound board, 5 shark-shaped puzzle pieces If you doo doo doo not know Baby Shark, you're missing the boat! Baby Shark has taken over YouTube and we've taken to creating a wood sound puzzle featuring this global phenomenon. Big, chunky pieces fit securely into board spaces, triggering the song that started it all-the Baby Shark Song. Cardinal's Baby Shark Chunky Wood Sound Puzzle provides a fun, engaging way for children to learn shape and sound recognition. Best of all, they get to hear the song they love over and over again. For ages two and up. Requires two AAA batteries (not included).