This music book is perfect for babies and toddlers. With its highly engaging format, ideal size, and Montessori-inspired illustrations, each page features a sound button to help your child sing along and recognize words while working on cause and effect, repetition, and fine motor skills. It's also an excellent resource for caregivers and teachers working with little ones to engage them in learning activities. The six nursery rhymes are all favorite classics: Humpty Dumpty, Finger Family, Skip to my Lou, Ring Around the Rosie, Row, Row Your Boat, and Star Light Star bright. This sound book comes with one powerful battery that can last up to 1:30 minutes, and you can easily replace it.