The ever entertaining and innovative Moonmilk is doing another series of Instrument-a-day projects. You should go check them out.
They’re great… despite the fact that he seems to steal ideas from my head before I tell anyone about them.
Sound Art – Instrument builds – Learning Resources – Data sonification – Interactive installations
Vulpestruments 
Dammit, you figured out my secret! My recommendation is that you wear a tinfoil hat from now on.