Music, lights, and lots of fun! The Baby First Bumper Book by Yookidoo is a unique bendable picture book sure to engage your baby's senses. The special soft design makes this Yookidoo bumper book perfect for lining around your crib or for floor play. The double sided Baby First Bumper Book features 2 different whimsical scenes complete with light-up smiley faces and 2 different melodies - one soothing and one stimulating. Each face lights up one after the other in time with the music, so your baby can follow the chain of lights as it moves across their book. Educational Toys Planet offers this musical baby toy as a great way to encourage motor development, strengthen eye control, and introduce your child to musical fun! The Baby First Bumper Book requires 3 AAA batteries.