Lilly goes to the park on a Saturday afternoon with her mom, Jennifer. She is playing and having a great time when she comes across a little boy named James who has something different in mind. He is playing differently than most kids, and Lilly discovers that he has autism. Lilly realizes that having autism doesn't mean that they can't be friends. Lilly learns how to interact with James, and the two become very good friends. This book is a great tool to explain autism to children whose siblings, friends, or classmates have been diagnosed with it.