The first time that I visited this museum it was quite small. As I remember it had a short film about the General and of course the General locomotive on display. I wasn't certain what a second visit would show but I was ready to see. I was pleasantly surprised because now the museum has about tripled in size. There are three main areas. One concentrates on the role of trains in the Civil War and particularly their role around Atlanta. Another area concentrates on a company that assembled steam locomotives. The last area concentrated on the Great Locomotive Chase. The movie lasted about 25 minutes. From there you could see a display detailing what happened to the participants. Finally after passing through a tunnel, you could see the General.
If you have young children, there is an area for them to learn about trains which I think would entertain them for at least 30 min. There is free parking nearby. The gift shop has a good collection of books, toys, tee shirts etc.