Go undercover and around the world with Lightning McQueen and Mater in the LeapFrog Tag Activity Storybook Disney-Pixar Cars 2 Project Undercover. Young readers travel to international destinations and learn words in foreign languages while reading at their own pace. As part of the Read on Your Own series, this LeapFrog Disney book stimulates young readers and builds their reading confidence. This LeapFrog book"s content focuses on understanding how to communicate and recognize others" feelings and emotions and exploring world languages. LeapFrog Tag books create a uniquely-interactive reading experience and are designed for use with the Tag Reader. Touch the Tag Reader anywhere on the book and the interaction begins. LeapFrog device sold separately.