LeapPad books strengthen voacabulary and comprehension through subjects like maths and science. Choose from:Dissappearing Donuts - Zoinks! Donuts are disappearing from the Doodles Donut Shop. Scooby and the gang follow the trail of crumbs in this big donut mystery. For ages 4 - 6Haunted Castle: When the Mystery Machine gets a flat tire, the only place to stop is a creepy old castle. Scooby-Doo and the gang are invited to stay for dinner, and meet an unexpected visitor - a ghost. Can your child help the gang get to the bottom of this haunted mystery? For ages 6 - 8. For use with the LeapFrog LeapPad Learning System (sold separately).