All aboard the friendship train! Puff along with Thomas as he finds a way to make his best friend Percy happy. This LeapReader Junior book springs to life when you touch the LeapReader Junior Book Pal to any part of any page. More than 24 playful activities and 150 audio responses encourage little ones to explore while helping build confidence with books. Parents can connect to the online LeapFrog Learning Path to see their childs progress and get printable activities to expand the learning!Please note an internet connection is required to download the audio for this book. Works with LeapReader Junior Reading & Tag Junior Reading System.