Did you know that today is Uncommon Instrument Awareness Day? Here is a list of some interesting uncommon instruments: http://southbanklondon.com/our-top-20-uncommon-instruments
There is also a very interesting and very uncommon orchestra. Yes, not just one strange instrument, but an entire ORCHESTRA! The Vegetable Orchestra performs on instruments made of fresh vegetables. The utilization of various ever refined vegetable instruments creates a musically and aesthetically unique sound universe.
Can you think of any other uncommon instruments?