Bamboo rain stick or "Pa-Ulan"
The pa-ulan (literally "asking for rain") varies in length from about 40cm up to five feet.
He is filled with mung-beans, rice grains or small pebbles.
Returning the instrument again and again, the beans fall slowly from one side to the other.
The fall of the stones is delayed by small bamboo pins that are driven.
Thus arises the typical sound of the rain stick.
This richly decorated instrument is used during rituals designed to induce rain.