I'm brainstorming on how to approach setting up an Arduino so that it would play a few small clay pots / bells / whatever else happens to be resonant and sensitive enough given the wattage I guess I would be working with. I'm sure that the programming end would not be too difficult as I have a bit of experience and could get by writing something that would do the trick if I get back into the swing of things, but I'm not so savvy on the electrical engineering end. So, briefly put: How could I best get an Arduino to hit something with sufficient force to provide at least the volume of say...a wind chime? Do I have to use some kind of intermediate setup, or could I just directly connect a series of weak servos [like 5 to 8]? Forgive me for my ineptitude. I am but a lowly musician with delusions of ingenuity.
Really, though--I think it would be cool experimenting with different inputs, like temperature, or perhaps just outputting semi-random songs [maybe the degree of randomness could even be modulated by some kind of input]. As long as the objects are chosen carefully to see how they interact in terms of their degrees of consonance, I think this could be quite pleasurable to listen to [or at least a novel introduction to the world or Arduino]. Extreme thanks to anyone willing to offer even a modicum of guidance to a total nube-ass who don't know schlock 'bout nothin'.
I think that your best bet is to use solenoids.
Check this youtube video and you will see what i mean 
You will need somer powertransistors or something to drive the solenoids, but it is not too difficult, just google for Arduino + solenoid
MikMo