I used to drive a lot.. and I'd take my kids along some of the time.. My son was learning what all the road signs meant.. He'd look at them and tell me what they meant... it was great fun until we came to a sign that had an arrow pointing straight up.. He could not figure out how any car could go that way!
I also had to explain to one of them what was meant by a sign that said "Dead End Campers Only" the child wanted to know what a dead end camper was? I had to turn around and go back to see what sign they had read... I laughed so much about that. Anyone ever seen a dead end camper?