This hardcover book features three stories--one each about Doc McStuffins, Sofia the First, and Minnie Mouse. The detachable music player enables little hands to play fun tunes by loading in one of three durable plastic discs-- for a total of 18 tunes. Kids will love playing fun tunes on the detachable music player as they follow along with the stories about their favorite Disney Junior characters. This book contains three stories -- each one featuring either Doc McStuffins, Sofia the First, or Minnie Mouse! The three music discs play a total of 18 tunes. Prompts throughout the book tell kids when to play each tune as they read. For added fun, kids can take the music player wherever they travel to listen to their favorite tunes independently.