Have you tried this? Observe the demo and then click through to the website. I'm getting addicted. It's so fun to experiment with ... setting up a number of boxes and hitting play or adding one at a time. It's a cross between wind chimes and minimalism. If you find a really good sequence you can save the url for future use.
Of course, if you'd prefer to have someone else make your music for you, just click through to the Daedalus site!