I’m allowed to ‘have a word’ rather than tell off, as I work for the NT, though it’s never actually the kids, it’s the parents, every time.
Fortunately, self-indulgent, pfb parents are not the majority but they are out there, like the mother (with the two children under ten, so what example was she setting) who started shouldering, and I mean throwing herself against a Tudor door to open it because she just wanted to see what was on the other side. It was closed and locked and clearly labelled as such because its too old and fragile to open/close on a regular basis. The door just along takes you into same room, but no, while everyone else is happy to stop and admire it, that wasn’t good enough, mother wanted them to experience going through the really old door. Until I reached her, the thuds as she repeatedly threw herself against it, could be heard on the floor above. Why, just why would you do that?? If you turn the handle and it doesn’t open, then leave it*. Who goes to an historic house and thrashes bits of it?
Or the parents of little Benjy, approximately two, going in the wrong direction on the Grand Staircase, straight into a coach party of about thirty pensioners, many of whom really needed to use the banisters, but no, Benjy was ‘exploring’. Pensioners all had to stop, wobble, move, back into one another because Benjy NEEEDED to go past, you see, its part of who he is.
What enrages me though is when you approach the parents and very politely ask them not to do something they invariably reply with an indulgent smile and ‘its fine, its ok’ Errr, no it isn't. Like a pp said, actually I’m more often than not concerned about the welfare/safety of other visitors or the collection than their precious darling but they just don’t/won’t see that. The arrogance is outstanding.
*actually, don’t even turn the handle thank you, if you are meant to go into a room the door will be OPEN, if its closed that is a sign the room is CLOSED.