Enter the wondrous world of optical illusions, where your eyes and brain play all kinds of amazing tricks on each other. This jam-packed, fun-filled book features over 90 mind-bending illusions, plus a kit of materials for creating your own optical teasers. Try to make sense of ¿impossible objects.¿ Marvel at illustrations that reveal more than one image. Discover the magic of moire patterns, the thrill of 3-D imagery, and the incredible world of stereograms. Beware, though: You won¿t always believe what you see . or what you believe. Includes: interactive book, 3-D glasses, colored films, mirror tricks, fun projects, and much more!.