Can you solve the most popular puzzle in the world? There it is, sitting in front of you, a simple, innocuous cube, each side a different colour. You've seen everyone do it -- they mix up the sides, then unscramble them again so that each side is a single solid color, and sometimes they do it in as little as seconds. Think you can beat their time? Watch out, the original Rubik's Cube 3x3 is much harder than it looks. And once you start, you'll never put down this addictive puzzle again.