Pet pal friends come to life on every page of this Ultra eBook Adventure Builder、 where the choices kids make can change the story ending! ? Help Buddy and Bella solve the mystery when the Golden Bowl trophy disappears from the dog show! ? 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)