My son, dil, 2yo and 4yo grandkids are returning from our AK cruise from YVR to RIC. I originally had them on the NS YVR-ATL, but the new schedule eliminated the last flight to RIC, so I had to have them re-routed YVR-SLC-CVG-RIC. This results in a 3+ hour layover in SLC.

Is there anything to do that would keep 2 small children somewhat occupied in the airport? Would it be worthwhile to leave the airport for an activity?