Originally Posted by hubs
How FAST do you want a new inexperienced rider ... with the judgement of a 6 year old and zero traffic experience ... to go???
What kind of question is that? If the kid doesn't realize the danger of traffic, he shouldn't be out on the streets at any speed without direct adult supervision. If he's being closely supervised, then I'd say "as fast as he can!" (as long as he doesn't go out of control and crash, of course)