This kit provides all the necessary materials for crystal cultivation, allowing you to enjoy phosphorescent crystals. Phosphorescent Crystal Cultivation Kit Phosphorescent crystals are completed in about 1 to 10 days. The process is relatively simple, and you will need hot water, a towel, scissors, and a refrigerator for cultivation. (The size and material may vary slightly depending on the kit.) After exposing the finished crystal to sunlight for about an hour, move it to darkness, and the crystal will emit a faint blue glow. [How to Enjoy Phosphorescent Crystals] To enjoy your finished phosphorescent crystal, expose it to sunlight for about 30 minutes to an hour. Then, move it to darkness, and the crystal will glow blue. When the glow fades, expose it to sunlight again. Then move it to a dimly lit place, and it will glow with a faint blue light. You can enjoy this process repeatedly. Website: www.aoiginga.com Thank you for viewing.