A while ago I made the Violog as an instrument for my band to use. It's a cross between a violin and a log, hence the name...
The sound is picked up through a piezoelectric disc on the bridge.
All materials were dumpster dived or acquired from scrap bins in my workshop.
If you want to hear it in action you'll have to wait until we finish mixing our current album and then I'll post some links to a couple of youtube vids.
So far it has been played with the bow, a tennis ball, a hessian sack, by whacking it on the ground, hitting it with strings, scratching it with fingernails and bits of wood... The list goes on. It is a very sensitive instrument and capable of many different sounds. We always have it going through an FX box or pedal and everyone in the band plays it (at different times of course!).
Right now I'm making a 2 stringed bass from the violin body and an old busted up guitar, I'll post more slideshows soon with any hope.