Mouthbow

The musical bow  is a simple string musical instrument part of a number of South African cultures, also found in other places in the world through the result of slave trade.  In the United States a musical bow is primarily found in the Appalachian Mountains, where it is called a mouthbow or mouth bow.  It consists of a flexible, usually wooden, stick 1.5 to 10 feet (0.5 to 3 m) long, and strung end to end with a taut cord, usually metal.  It can be played with the hands or a wooden stick or branch.  Often, it is a normal archery bow used for music.  (More from Wikipedia)