Looks like he's having a good time, Bret.
I can remember driving an old Ford lawn tractor when I was about that age. They told me that I didn't had to cut in circles, so I'd use the mower to make pictures in the grass THEN I'd mow it all down.
Momma is fighting letting my oldest (10) drive the mower. He just isn't quite big enough to drive a lawyer designed mower with seat safety switches and a bunch of other crap on it.
I could bypass 'em, but...... Man how would I feel if the boy got hurt.