Usagi no Nedoko (Rabbit's Bed) Luminous Crystal Growing Kit - Science Project This is a growing kit for creating crystals that glow in the dark. After exposing the grown crystals to sunlight for about an hour, they will faintly glow blue when observed in a dark place. The luminous crystals will be completed in about 7-10 days. Each crystal has a different shape. Enjoy creating unique crystals that will beautifully grow in your home. ■ Contents Crystal base A+B+C, Seeded mother rock, Growing container, Stirring spoon, Paper cup, Instruction manual, (Supplementary: Crystal base B+) ■ Things to prepare Hot water, Towel, Scissors, Refrigerator Brand new, unused item. Please check the profile, and if you have no questions, you can buy it immediately.