Slick Sand truly is the closest thing to soil from Mars that most of us will ever experience. Slick Sand Red is great for sand and water tables and makes hours of fun! Slick Sand will not get wet! So when you pour water on it, the water will stay on top and flow, instead of wetting the sand and sinking down as happens with ordinary play sand. And it never gets wet—put it in water and take it back out, Slick Sand stays completely dry.