Oh, he gets that idea, just lots of other ideas as well. I've been doing some side by side riding in the campsite, and he is good at stopping when told, or when a car is coming. But, without being solid about left and right added to the dubious decisions he takes, I'm wary. I was thinking of giving him challenges he could achieve as a way of improving control and retaining his interest.
It is fun seeing him pedal at about 200 cadence, head down, though