Yoo Yeh 250B
This is Yoo-Yoo (Yo-Yo) Yeh's 250B page
today Sasha let me borrow the small Radio Shack amplifier+speaker and i tried to get my roommates to listen to my heartbeat through a piezoelectric disk. not as good as a stethoscope, but fun. :)
Going off the "rain chime", perhaps it could also be possible to have a "slinky piano"? :)
And if you have never been in the stairwell of Packard, I think the stairwell between floors 1 & 2, and 2 & 3, have great potential. Lots of echoes there, and the stairs are made of metal!