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.

Source: Wikipedia — Rainstick (CC BY-SA 4.0)

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.

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Source: Wikipedia "Rainstick" · CC BY-SA 4.0

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