Sailing Ship Kite
$45.00
Flash Rocks
Knock them together for an electrical effect!
See a piezoelectric rock show - rub these rocks together and watch them glow internally. It's electric potential in your hands. Flash rocks - aka quartz - are one of the few minerals with piezoelectric properties. So, when subjected to mechanical stress, these two little rocks generate an electrical charge.
Recommended for ages 5+
