I'm a stair-taker because elevators and escalators give me nightmares, but for all those lazy folks who don't have fear motivating them to take the steps, there are these piano stairs. How could you not want musical accompaniment like that?

OK, so maybe you don't want to hear a playful tune as you skip up and down steps. It's still a fun idea and apparently showed a huge increase in individuals taking the stairs. [YouTube via Marco G.]