Rio Grande narrow gauge cabooses (cabeese?) have square-shaped nuts and bolts. How do I know this? Years ago, I worked with Colorado Railroad Museum volunteers to help restore a caboose, replacing hex heads with the authentic hardware. It felt great getting to restore a bit of Colorado railroading history, and I connect with the caboose when I come through the museum.
Connect with history on your own by volunteering with your local museum, or consider working on one of the Friends of the C&TS worksessions this summer. But don't just connect with history, connect with a family member, a spouse, or even a friend over your work together. Meet some new friends and get out of the routine!