Rhythmania
This is a smart pedal that chooses music to play based on the rhythm of the user stepping on it. It enables people to dance spontaneously, leaving the task of finding music to Rhythmania and disrupting the convention that people have to adjust their moves to the music.
This interactive device was featured multiple times in events and expos.
I was demoing Rhythmania at the first hackerspace in China, XinCheJian.