My 9 year old son is ready for a new bike. Pretty much, the new choices from Trek and the like are mountain bike styles. I wanted to show him some road bike alternatives and thought that a 70's classic might be the way to go. When I was his age I had a Raleigh Chopper. Pretty cool, but I think he'd have trouble keeping up with his older brother on one of those. Thus, I was thinking about a classic 10 speed, but in junior size. Are there any accepted "classics" among kids' road bikes that I should be looking for?