Why do certain geometric patterns appear to pulsate? What makes your eyes see colour where there is none? How do colourful rings appear on a spinning black-and-white disk? Learn through 30 mindboggling experiments that will wow science geeks of all ages. Seeing comes with almosteverything needed to experience the amazing effects - including spinner, reflective sheet, straws, and pipe cleaners - and the tear-out pages make it easy to share the fun with friends!