Don't believe what you see because you're about to encounter all sorts of things that aren't quite what they seem. This collection of incredible optical illusions may look like just one book, but it's really two! When you reach the end of the first one, you really aren't done--flip it over and start again with yet another book of challenging puzzles. Between the covers you'll find amazing tricks for the eye as well as for the mind. Behold gray spots that appear and disappear, solid objects that can't exist, and straight lines that wave and bend. Circles shake and patterns pulsate. Mazes baffle and pictures with hidden objects dazzle. Create your own 3-D viewer, create rainbows, perform magic by making a scarf disappear, and more. Incredible--but real--you're in for some astonishing surprises.
Collects optical illustions in which gray spots appear and disappear, straight lines wave, circles gyrate, and intricate patterns pulsate.
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