For the past two years we've taken the kids to the Nevada Southern Railroad while visiting Grandma & Grandpa McLean. This is by far super fun for the kids and is just the perfect length. Even the 17 month old did great on the trip.
We always get there early because there are so many cool trains to look at while we wait.
This year they had a post office train for us to walk into and look at. It was really neat just to see how the train car would of been set up.
This year we arrived a little earlier then expected. It turned out to be the best decision ever. They were letting people into the driver's seat to see how the train operated. I think the adults may of been more excited then the kids but the kids did get to pull the train whistle.