My son skipped into the go-kart facility, and his energy quickly matched that of the speedway — loud and zooming this way and that. We had arrived to celebrate the birthday of one of his classmates, and the highlight of the party was the go-kart race. "I'm going to be No. 2!" he proclaimed, planning to leave the No. 1 spot for the birthday boy. When it was time for my son to get into his go-kart, I watched intently from the sidelines. It was impossible to hear the orientation