LeapFrog LeapPad Ultra eBook Letters on The Loose Game Join a wacky word adventure as things go haywire at the Letter Factory 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); Internet connection may be required