The Smithsonian Electronic Crystal Growing. Grow your Own Amazing large crystals, crystal clusters and Crystal Geodes. Grow Gold "Citrine", "Emerald", Amethyst" and more. Includes Crystal Growing Chemicals, Crystal and Geode Growing Cup Molds, Casting Compound, Safety Goggles, Color Changing display base and detailed instructions. Ages 10 And Up Learn About Crystalline Habitats And Crystal Structures Watch As The Electronic Base Makes Your Crystals Change Colors Includes 35 X 23 Inch Color Poster Origin- Imported # Pieces In Set: 13 Included: Instruction Manual(s) Learning Skill: Memory Skills, Science, Creative Thinking Measurements: 15 Length/Inches, 12 Width/Inches Assembly: Assembled Base Material: 100% Plastic Care: Wipe Clean Country of Origin: Imported