Deluxe Space Age Crystal Growing Kit: 13 Crystals Delight and amaze with Kristal Educational's Deluxe Space Age Crystal Growing Kit (13 Crystals). Grow 13 sparkling crystals and display your creations on the included LED stand. Each kit contains crystal-growing chemicals, growing containers, stirring sticks, base with LED display (assembly required), and a 48-page Space Age Crystals booklet. Additional items may be required. Crystals can grow up to 8-inches in diameter. For ages 10 and up - Instructions included