Just trying to be sure not to get something that is too dusty. I have read that reg play sand is dusty and I want to be sure it clumps the poop a bit so I can sift it. I think I might try the sand I found at Home Depot called "natural play sand". It was super smooth and silky feeling. Seemed like they would like "bathing in it. I hope its not dusty. Wouldn't the concrete or masonry sand hurt their feet as they walk on it and not be comfortable for "bathing"?