Contained in this coloring book are 50 mysterious drawings that are to be viewed by placing a cylindrical mirror on the book to reveal the real picture. That will be an exciting art activity for your kids. Let your kids color the deformed images and amaze them by revealing the real images! Materials needed to reveal the images: 1. Mirrored Foil or 2. Any cylinder with a diameter between 1.5 - 2 inches. (If you don't have mirrored foil, any cylinder with a reflective surface will be perfect too.) Easy Preparation: 1. Wrap the mirrored foil to make a cylindrical mirror. 2. Place the cylindrical mirror on the paper. Amazed at the images revealed!