Book comes with a toy cell phone that enables children to listen to messages from Dora as they follow along to a story. The book and cell phone are recommended for children ages 3 years and older. The toy cell phone has nine buttons and a digital screen. When children press a button, an image related to the button appears on the screen. Kids know when to press the right buttons by matching them to picture icons in the book. Nickelodeon, Dora the Explorer: Hola! It's Dora has coated, board pages that resist rips and tears and wipe clean of spills. The book conforms to the toy safety requirements of ASTM F963-08. Three replaceable AAA batteries that power the toy cell phone are included.