Same over here. If they come dressed all pretty, I might make a comment at the door when they're dropped off. "oh, what a pretty dress, we'll have to be extra careful at the sand table today" lol And they go home just the way they came. One ruined dress should be enough. My clients have all said to me, the dirtier they come home, the better. I believe in kids being kids. I'm not going to stress myself out over someone getting some dirt on their dress.