As you open this book, the swimmer swims, the gymnast cartwheels, the skater twirls. It is like a Harry Potter movie, where all of a sudden the pages come to life! The book uses "scanimation" which is a six-phase process that combines the "persistence of vision" with a lined acetate overlay to the give the illusion of movement. A totally new technology which has to be seen to be appreciated! Hardcover, 24 pages, 9 moving images.