Everyone around here would drive real early. Mom learned to drive at 12, the old farm truck. But all the young people learned to drive tractor early anyway. You can get a "farm license" here at 14. That means to drive on your farm, the nearby farm, to school, or to church. It is not unusual to see a kid driving a really big tractor down the road. The "school busses" (tractor and horse trailer) are driven loaded with kids in the horse trailer every morning by kids who graduated the 8th grade last year. I guess it just depends on where you live.