My son is 5 1/2. He got a LeapPad 2 from Santa. This ultra book is what he wanted to download with some of his Christmas money, and I couldn't be happier with his choice! He LOVES it!! He loves the story being a mystery, he loves the games that go along with the book, I love the fact that he is soundin out words, and the fact that it gives definitions for some of the words that kids may not understand right away. We have all stumble over our words a few times when our kid asks us what something means, this gave words, phonetics, and a picture for a visual. I can't say enough about these ultra books! FANTASTIC!!!