Just add water and watch - within seconds, Insta-Snow powder transforms into a solid, and then erupts into a fluffy, white, snow-like material! Great for sensory tables and discussions about states of matter, especially liquids and solids. The Insta-Snow will eventually dehydrate, and the powder can be used again and again. Expanding 100 times its original volume, the 3.5 oz. pouch will make 3 gallons of Insta-Snow. For ages 4 and up.