From planes to trains to extreme machines, the LeapFrog Tag Book: Let"s Explore...Things That Go! teaches kids about the physical science of how different things move. Use the #1 selling Tag Reading System (sold separately) to bring this book to life. LeapFrog Tag Book: Let"s Explore... Things That Go! * Features photographic images, factual information and fun activities that encourage children"s awareness of the world around them and the physical science of how different things move * This Learn through Reading book is part of the LeapFrog Tag Reading System * The Tag System helps children develop and strengthen critical reading skills, and the Learn through Reading series is designed to help them apply those skills to explore topics like science, geography, writing and more * The Tag Learn to Read System library features 80+ interactive books, puzzles, maps and more * After the reading story, kids can play learning activities that help build vocabulary and reading comprehension skills * Parents can connect the LeapFrog Tag book to the online LeapFrog Learning Path to see what their child is playing and learning * Appropriate for children ages 4 to 8 years * LeapFrog Tag Reader sold separately