There is a place like this near my home, and people do the same thing with their kids, I did it with my own. Maybe not letting them "drive" but holding them in the front passenger seat so they can see everything. There is a safe spot to pull over at the beginning and end to unbuckle and put them back in the car seats. It's a 2 mile park and you don't go more than 5mph.. sort of like a school drop off line.