Glow Snow - 30ml Pet Plastic Bottle with Bamboo lid This is the perfect fun creating spooky Halloween scenes, or just using in your Frankenstein & Monster Science experiments. Allow the Glow Snow to activate by leaving it in the sunlight for about 10 minutes. Best when spread out on a plate so the whole ingredient can absorb the sunlight. Pour over small amounts of water and watch it bloom, or for an instant snow explosion add a whole cup of water to the bottle of snow. For the best spooky fun it is best done in the Dark (or in a dark room at least) One bottle will make approximately 3 cups of instant snow.