The dragons will fly right off of the pages, thanks to the 3-D viewer and visually striking imagery in this movie storybook based on the upcoming Dreamworks film, "How to Train Your Dragon." Kids will love exploring the dragon world with this book and 3-D viewer set. The book, based on the movie "How to Train Your Dragon," prompts kids to view one of twenty-four 3-D images with the viewer. The viewer contains no batteries that need replacing and, with the three cards, allows kids to view twenty-four giant 3-D images of all their favorite characters.