How old are the kids?
Museum in Laramie on campus is pretty cool, Geological museum.
Saratoga has the hot spring pool, swimming pool too for kids and adults. Neat small town.
Cabin in the Snowy Range if any are open, great hiking and scenery.
Just the drive over the top is beautiful on Highway 130.
Casper has lots of shopping and bigger town.
Laramie has smaller town shopping and good local beers.
Sheridan is a nice town too, walk downtown and go to King Ropes.
Central Wyoming Machine Gun and Cannon shoot South of Casper, full auto rentals to shoot and cannons going off to watch. Exploding targets.
Devils. Tower is very interesting if you take time to walk right up to it and around it.