The results of randomly selected groups of four people tasked with writing and recording a song in an hour.
The DS has wifi so this method seems like an unnecessary gimmick until you take into account sharing the sound files online. Only out in Japan thus far, but there's already some level-swap activity on youtube.
The sounds are produced via miniature bellows and paper cones. I had no idea such things existed.
Sculpture with carefully placed perferations reveals different stanzas of a poem based on the position of the sun.
The best Star Wars figures ever.