Graham went biking for the first time on his birthday with Erin, Jerry, and me. He did very well for the first three blocks or so. But when we stopped to take a break, and Erin pulled alongside us, he got very upset that she couldn't hold him. So I headed straight home and he cried the whole way. Jerry thought that part of the problem was that his helmet is so big, he gets frustrated trying to see. I have trouble imagining that being true...