RAINSTICK
Rainstick
A rainstick is a long, hollow tube partially filled with small pebbles or beans that has small pins or thorns arranged helically on its inside surface. When the stick is upended, the pebbles fall to the other end of the tube, making a sound reminiscent of rain falling. It is designated 112.1+133.1 in the Hornbostel–Sachs classification system.The above text is a snippet from Wikipedia: Rainstick
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