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. Wood puzzles for kids 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. great for toddler puzzles ages 2-4 and puzzles for kids ages 3-5. Requires two AAA batteries (not included).