Make:

The Steel Rod Box creates some surprisingly pleasant sound from surplus surgical hardware -

For reasons unclear, my father has a few boxes of unused spinal surgery equipment and tools in the garage. including a whole heap load of stainless steel rods that are threaded the entire length.

Something had to be done.

So i've come up with the Steel Rod Box, rods of varying width screwed in on both ends into a basic wooden box. I've included a simple contact mic from a piezo transducer to pick up the vibrations for amplification.