I participated in their "Engineer for an Hour" program. For $250 they teach you how to drive one of four diesel locomotives in their collection. I choose the huge Union Pacific GP-30. An engineer and a brakeman ride along with you. The engineer told me how to work the controls and the brakeman acts as your eyes when you go backwards through the railway crossing. The guys were great and made the experience a lot of fun.
It took two hours each way to get there and back on the bus from my Las Vegas Strip hotel but it was definitely worth it. I will do this again to try out another one of their locomotives.
$8 train rides are also available on weekends.