One day I asked him, How old were you when you first rode on a train? He said, Six. I said, no, no, you misunderstood me. I mean, how old were you when you first rode on a train all by yourself? He said, Six. (he was kind enough not to suggest I was the one who misunderstood). He said he went to school on the train by himself. I said, Where were your parents? He looked at me with dismay and said, They were working of course.
Unfathomable as it might be today, it will be fathomable sometime in this century for K-12 students to take the train to school. In fact, in Minneapolis all high school students already have free bus and light rail passes to come-and-go to school.