10 certainly seems like a sound and conservative estimate from the National Traffic Highway Safety Administration to parents about child development and when its appropriate to let loose the kids to go play in traffic on their bicycles.

I bet they even did some studies.

of course, parents have considerable leeway. I think some safe cycling classes could only help. The League of American Bicyclists has a couple of courses geared to parents and their kids riding in traffic safely.

I'm off for a ride now, but i will look into the recommendations from the only nationally recognized bicycle education program, and get back with their recommendations later.