Re: buses...yeah, schools just don't provide as many these days. For example, my kids don't have the option to ride the bus because we supposedly live too close to the school. Well, yeah...as the crow flies, it's maybe a quarter-mile. But you can't get there as the crow flies because fences and a big old water reservoir. So to walk you'd have to go around by the road, which would take a minimum 30 minutes. And there are no sidewalks. And it's a busy street. No way in hell I'm letting my 2nd grader and kindergartner do that, especially during the freezing winter months. I'd much rather have the extra 30 minutes every morning and drive them myself, since it takes less than 5 minutes to drive it and I can get them there safely and warmly. But according to the (relatively wealthy) school district, my kids are classified as walkers.
I don't know if that's what's going on with the girlses and other kids, but it's a real possibility, especially in poor rural Kentucky or wherever they are.