Katamari Damacy is a very cool game, if for no other reason than it is a game in which “scale” changes. The basic idea is that you roll a ball around which picks up objects that aren’t too big for the ball and then the ball grows. Usually you are racing a clock to make your ball big enough. I know, I know, it sounds crazy, but it’s highly addictive.
But this, this is way cool. A controller for the game which is….a big shiny metal ball: