This educational product helps children in 3rd to 5th grade learn fundamental skills and explore topics that interest them the most. Each book (sold separately) is packed with engaging activities, games, stories and facts that fascinate kids. The Quantum Pad Learning System features engaging audio, games, activities and quizzes that make learning fun. It comes with an interactive sampler book of the Quantum Pad library. Other Quantum Pad Interactive Books and Cartridges sold separately. As an added bonus, this system also works with all LeapPad books and cartridges (sold separately). Requires 4 "AA" alkaline batteries (not included).