Rainstick

A rainstick is a long, hollow tube of bamboo or dried cactus that is partially flooded with small pebbles, rice, dried beans, or other hard granular matter. The inside surface of the tube has small pins or thorns arranged helically. When the stick is rotated and held upright, the pebbles fall to the other end of the tube, bouncing off the internal protrusions to create a sound reminiscent of falling rain.

In South America, rainsticks are believed to have been invented by the Mapuche, and was played in the belief it could bring about rainstorms. It was also found further north on the coasts of Chile, potentially having also been used by the Incas. Mapuche rainsticks are usually made from any of several species of cactus such as Eulychnia acida and Echinopsis pachanoi. The cacti, which are hollow, are dried in the sun. The spines are removed, then driven into the cactus like nails. Pebbles or other small objects are placed inside the rainsticks, and the ends are sealed.