LeapSchool friends come to life on every page of this Ultra eBook adventure! ? When Gig creates a robot to clean his room、 he needs help when things quickly go wrong! ? Teaches comprehension、 vocabulary、 phonics and word recognition skills  ? The story is written at 3 different levels、 progressing from simple text to more complex words and sentences  ? Appropriate for children ages 4 to 6 years (grades pre-K to 1)  ? Only works with LeapPad Explorer? learning tablets (sold separately)