Since we live on a very busy street, we take him over to a nearby office parking lot to let him practice. The routine is typically: he tries for awhile, it gets difficult, he gets frustrated, says he's tired and quits.
Well, today he was finally able to ride his bike. We are so proud of him for not giving up. No sooner has he accomplished this goal when he informs me that he now wants me to take the training wheels off. Oh boy, the next challenge has begun!