Rainsticks have been used for centuries across the world. Indigenous cultures believed the sound of rain would encourage rainfall for their crops. The instrument is usually made from a long, hollow tube filled with pebbles or beads. Nails, cactus needles or something similar are placed in the walls of the tube When the stick is turned over, the beads or pebbles fall through the gaps and produce the an evocative sound of falling rain.
I use this to gently stir you from your relaxed state at the end of a session or to cleanse, enliven and shift the energetic space around you.