Dust Devil (Make a Vortex)

Spin the propeller on this sculpture to recreate a tornado-like motion.

Visitors spin the propeller to create a vortex in the center of the tank. The vortex sweeps up fine particles of sand into the swirling whirlpool. When the handle stops turning the vortex dissipates and releases the particles. You can watch the sand slowly drift and settle out of the solution, just as dirt particles are released by desert dust devils.