Brain Games Optical Illusions Author:Editors of Publications International, Cynthia Fliege (Illustrator), Jen Torche (Illustrator) Brain Games: Optical Illusions is a fun and unique way to get the mental exercise you need. The workout here is more focused as you'll be asked to draw on your powers of observation and visual reasoning skills in order to unlock the tricks behind these illusions. A variety of different optical illusions, from tricks of perspective to p... more »erceived motion, are included to keep you entertained. Seeing is believing, right? Well, in the case of optical illusions, you might find it hard to believe what your eyes are telling you. Objects that seem to be different sizes are really identical; pictures move on the page; images that appear one way suddenly become something else altogether. Don't run off to the optometrist. This is all part of the fun and the mind sharpening powers you get when trying to solve the challenges in Brain Games: Optical Illusions.« less