Lighting sand clock : Star Showers
Presenting Star Showers, An ever changing display of light... trapped in time. Star Showers creates a hypnotic, comet-like stream of illumination that glistens and sparkles as electrified glass beads slowly cascade through it's center.
(?/ e-goods/ planetlava.com: $49.99)
I don't know how it works.It seems like fluorescent coating glass ball are electrostatically charged.
