Make a crystal volcano on a paper cone watch long spindly crystals form on a rock grow crystals in a petri dish and on a string! Experiment with different chemicals to make crystals of different shapes. Manufacturered by Thames & Kosmos. Learn about how the crystals form in your experimental solutions and in nature. Compatible with other kits in the award-winning Ooze Labs line use the Colorful Crystal Lab station independently or combine it with other Ooze Labs stations to create the ultimate chemistry laboratory! Grow a variety of dazzling colorful crystals using safe non-toxic crystal salts.