If you are bringing the family, Lagoon amusement park in Farmington is nice. Put the kids on a ride, and slip off to check out their small, but interesting, firearms museum (and you thought I'd get you on a ferris wheel and leave you, now didn't you?)
On the north side of the road from Brigham City to the Golden Spike Historic Site is the Shaky T, the Morton Thiokol Rocket Plant, which makes rocket engines for Minuteman missiles and NASA. I don't know that they do tours, but at least check them out as you drive by.
As long as we've got you in the middle of nowhere, go west from Golden Spike to the Great Salt Lake, and see the Spiral Jetty, a giant, well, spiral jetty, built out into the Lake as a work of art. Not a military site. With spring runoff, it may be under water now.
The Mormon Church stresses Family Home Night, and a good thing to do on Family Home Night is play games. So, you'll find game stores along the Wasatch Front selling Monopoly, Chutes and Ladders and other board games. Many also carry wargames. One of the best is Endzone on South State Street in Clearfield.
The Visitor Center at the south gate to Temple Square in Salt Lake City has a wonderful model of Solomon's Temple. Always makes me want to build an Ancient Israelite army and the terrain to go with it!
The region has sizeable Chinese (brought in to build the railroad) and Greek (originally miners) populations, so the Greek and Chinese restaurants can be good. Some of the Chinese restaurants are called noodle parlors.
And, definitely see Craig and the guys at Gajo!
Grelber
weighs the pros and cons of using a power drill on the minis workbench.