Disney FROZEN - A SLEEPOVER PARTY, Little Hippo Books - Augmented Reality Discover the alphabet with Frozen, includes interactive reading and learning with 13 Come-To-Life Pages. Color, play games, find hidden objects and more as you read, learn and play with the free Hippo Magic App. Little Hippo Books uses cutting-edge-augmented reality (AR) technology to revolutionize reading for the next generation. With our free, downloadable app, we create an immersive, interactive reading experience.