the rubik's cube. the genius who invented it must have really been bored then. but it was one of the world's best selling puzzle in the 80's, where it just was released. now, in the present, it has died down but some people still know how to solve it. either nerds, people who cheat off the net, or old-timers, who have already done it for the past 20 years. even i know how to solve it. haha i am not a showoff. whatever you think that is