Foundation ANAR, a nonprofit organization dedicated to the protection of children at risk, has come up with a clever illusion as part of a campaign against child abuse. The images use lenticular technology to communicate different messages to children and adults, based on their respective heights and angles of view.
The views expressed are those of the author(s) and are not necessarily those of Scientific American.
Susana Martinez-Conde and Stephen L. Macknik are laboratory directors at SUNY Downstate Medical Center. They serve on Scientific American Mind's board of advisers and are authors of Sleights of Mind: What the Neuroscience of Magic Reveals about Our Everyday Deceptions, with Sandra Blakeslee, now in paperback (http://sleightsofmind.com). Their forthcoming book, Champions of Illusion, will be published by Scientific American/Farrar, Straus and Giroux.