 You look what threats are going to come from outside the perimeter. And like I said, a ninth grade deer hunter, you wouldn't even have to go that old. My 11-year-old daughter, heck, and I'm dead serious because my son just got a knack for common sense and way smarter than I was when I was a kid. First, going into second grade, son would have said, that building you have to protect right there first.