Prep the growing solution and watch as dazzling quartz crystals begin to bloom. For detailed instructions please refer to the included booklet. Each kit grows one crystal cluster and one single crystal both up to 4-inches in diameter. Manufacturered by Kristal Educational. Each kit contains crystal-growing chemicals crystal-growing containers stirring rod and 48-page Space Age Crystals booklet. Additional items may be required. For ages 12 and up - Instruction booklet included Grow your own gorgeous crystals with the Space Age Crystal Growing Kit: 4 Crystals (Quartz Emerald Amethyst) from Kristal Educational.