Thames and Kosmos Glowing Crystal Geode J. K. Rowling Book and keep your child engaged

and keep your child engaged for hours in a challenging and entertaining game

Thames and Kosmos Remote-Control Machines: Space Explorers Specs

UPC: 812095021460

Experiments: 1

young researchers gain hands-on experience with the engineering design process and they learn about various topics in the fascinating world of mechanical physics and engineering

Thames and Kosmos Glowing Crystal Geode J. K. Rowling Book and keep your child engagedCreate your own crystal geode a round rock containing a crystal filled cavity. First, cast a plaster geode shell in the mold and then fill it with a crystal growing alum salt solution. The crystal solution contains an ultraviolet luminous pigment that gets incorporated into the crystals as they form, resulting in a geode that glows in ultraviolet light. An ultraviolet flashlight with holder, as well as a display stand for the geode, are included.