S'mores "SnoWonder - Instant Snow" by Midwest.

SnoWonder is easy and fun to make. Simply add water and it makes 18 oz. of "snow" that is non-toxic, non-abrasive, non-corrosive and real-like to the eye and touch. In the event your display dries out a bit, a slight mist will restore it. Store in a plastic baggie and add water to revive.