I concur with all that has been said about kids at the field. Mine stay at home with mom just for that reason. I'm not so worried about what they might accidentally do to my plane, but what they could possibly do to somebody else's.

And along those lines...for Christ's sake, leave your dog at home too. I know, I know, "He won't do anything, he's a good dog". Sorry, I could care less if he can bark the Star Spangled Banner, if he somehow tramples on my plane while it sits there in the pits, my day will turn pretty crappy.