Did you know that there is a US mint in Ft Worth.! http://en.wikipedia.org/wiki/Bureau_of_Engraving_and_Printing

The Bureau of Engraving and Printing has a Western Currency Center located at 9000 Blue Mound Rd in Ft Worth. For information about their tours, go to http://www.moneyfactory.gov/locations/section.cfm/25

Basically, they are open during the week from 8:30 until 5:30. Tours for individuals are done on a first-come-first-serve basis. They want you to arrive 30 minutes before the tour begins to be able to do a security clearance. Tours are every half hour. They also have 2 floors of interactive exhibits.

The Currency Center would make a nice add-on to having lunch at The Classic Cafe in Roanoke.....