With the Space Age Crystals (13 Crystals) you can grow a collection of 13 sparkling crystal specimens in 4 colors. Use this kit from Kristal Educational to grow glittering crystal clusters, geodes and single crystals. The resulting crystals resemble emerald, quartz, topaz, and ruby. Your kit comes with everything you need: crystal-growing chemicals, geode mold, casting plaster, crystal-growing containers, lids, stirring rods, and a 48 page Space Age Crystals booklet, plus instructions. For ages 12 and up. Award-winning Kristal Educational has received over 30 leading toy industry awards since 2007. Everything we do is based on hands-on education, personal discovery and fun.