Engages kids through books, audio and 3D-like animations for an experience that reinforces learning and helps kids better understand the concepts Interact with the on-screen animations by using the stylus to tap on the pictures and words to explore reading, counting, problem solving and more Most replayable activities have two levels WITH more than 50 key skills per grade level covering a variety of preschool through first grade subjects Includes 700+ activities across a library of more than 25 books (sold separately), which includes two learn to read book sets Grow-with-me stylus is comfortable for kids of all ages and promotes proper writing grip. A computer with an Internet connection is required to download books onto the LeapStart system. Not compatible with LeapReader books or systems. 3 AA batteries required