Optical Illusion Growing/Shrinking Ring
Dude, I am such a sucker for things that regale and mesmerize without requiring me to determine which geometric proofs or laws of physics or wonders of nature make them work. That's why I fare so much better with optical illusions than I do with school and women. Whether you wear this ring like a pimp, or just keep it in your pocket ready to whip out at hot-chick-in-the-Planned-Parenthood-waiting-room game time, its braided gold design will captivate all who see it rotate in one direction to seemingly grow larger, and then in the reverse direction to shrink back down. Note: the actual size of the ring never changes. Heady stuff, man. Heady, heady stuff.