Just let kids be kids. I mean what is the harm. Kids are generally smart enough to know the difference between playtime and non-playtime.
Yeah, its more common these days. I get more and more high school kids coming into the gun section only to start pouting and stomping their feet when I wont take out a handgun for them. (they have to be 18) I tell'em Im definately not letting them handle a weapon if they wanna act like a two-year old.