Kids under 12 are free and adults are $7 with discounts for military and seniors. The gift shop had some great train books, one of which my father-in-law was seeking.
Upstairs is a big model railroad layout. Some sections are not yet complete, and all the work is done by volunteers. It may not be open if they are on a break and the museum is short staffed. We sweet-talked them into opening it for us. The detail was incredible.
There are a few details that are fun to look for.
Off to the side was a small system for kids to operate. The lady in charge also let the kids work the main layout, under careful supervision.
Downstairs is an inlaid map of the railroad with completion dates. Shades of marble indicated altitude.
Tell 'em we sent ya!