Book excerpt: "If you have looked at a painting and wondered what it might be like to be inside it, or wondered what it would be like to see it move, imagined what it would be to have a picture "play back" its story to the viewer, changing over time, that is what mobiles are about. When I discovered mobiles, I felt at home. Perhaps I can impart some of this enthusiasm to you. Movement attracts the eye. We are hard-wired as a species as hunters. We have the hunting instinct of seeking movement and detail from the environment. Mobiles with their inherent eye-catching quality of movement are a natural to grab our attention"--Back of book.