The Disney Princess: What Do I Hear? sound book has an attached four-button audio module that enables children to add sound to a story. Children lift flaps on the book's pages to find icons that match the buttons on the audio module. This sound book is recommended for children ages 18 months and older. The book's thick, coated pages help prevent rips and tears. Three replaceable long-life AG-13 button cell batteries that power the book are included.