Giant plans

Gabe has decided his career/life goals. We ask him sometimes what he wants to be when he grow up, trying to get a sense of what he is thinking. Gabe now says that when he grows up he wants to be an “all aboard”, also known as a train conductor. Just when we start to imagine him working on a train, he said that when he gets even bigger he wants to be a policeman, and when he gets really big he wants to be a giant. I guess I had better start saving up for giant schooling. Is that a four year program?