12 months & up. These musical books will brighten any day! Follow Ditty Bird on many musical journeys with 6 of his favorite nature songs and 6 fun songs to discover different careers in a funny way. Through the Nature book, children will discover captive illustrations and songs for young children to learn about the weather, seasons, and different kind of animals. The Career book is the perfect title to discover different careers, ideal for preschoolers as they will explore what they want to be when they grow up, through songs. Each book comes with three LR1130 batteries, instructions for replacement can be found on the back cover of the books. Includes 2 musical books.