Rollercoaster This short story is a five-minute bedtime book about a child who is nervous about going on their first rollercoaster. The kid speaks about their fear, excitement, and the atmosphere of the theme park. The series aims to tell fun, engaging, diverse stories. Each book has a reading level assigned to it depending on the difficulty of the words. The books are designed to be used as a learning-to-read tool, read-along, or a "popcorn" reader.