This is simply part of Suburban hunting. Either use it to your advantage by figuring out how the deer will move, or hunt early in the morning BEFORE the kids are outside. I have one stand site where this some times happens. The kids never stay long, they have no idea I am around and as soon as they leave the deer still come through. Deer do not seem to be alarmed by kids playing. They will stay clear of the area while the kids are in it, but they seem to know that they have nothing to fear from playing children.