Slick Sand truly is the closest thing to soil from Mars that most of us will ever experience. Blue in colour and very dry and dusty, Slick Sand is hydrophobic sand with the same properties as sand on Mars. This amazing sand stays dry even when immersed in water. Ideal for hands-on investigation and water play, this non-toxic sand can be moulded and formed into shapes underwater then lifted out to be used again and again. And it never gets wet—put it in water and take it back out, Slick Sand stays completely dry.