Copernicus Toys - CC: FLASH ROCKS

Knock these rocks together for an electrical effect. Flash rocks are one of the few minerals with piezoelectric properties. So, when subjected to mechanical stress, these two little rocks generate an electrical charge and glow. 6x1.5x3.5" peggable card with information. Part of Copernicus Toys Compact Curiosities line. Small wonders perfect for Advent gifts, Hanukkah gifts, and Christmas Stocking Stuffers