Crystals are really awesome to look at, but they're really interesting too. Crystals are a special kind of solid material where the molecules fit together in a pattern that keeps repeating itself. Because of these patterns, crystals form all sorts of unique shapes! This super set is ideal for anyone with an interest in learning about the world around them and is a great rainy day activity. The set includes everything you need to grow 4 different kinds of crystal. Set includes: 4 bags of crystal compound, 2 crystal display trays, measuring jug, granite base rocks, plastic thread, wooden mixing stick, 6 record sheets and instructions.