Set a time limit if necessary to complete the scavenger hunt. Sheet listing the items to be scavenged, enough copies for all. The bigger the airport, the better. Either assign or have kids choose groups, 2. Hand out sheets with list of items.
Award points for each item completed and winning team can receive prize.
We've even awarded convention scholarships as. Get one air sickness bag. 5 bonus points if from Ozark. Any baggage claim ticket, not ripped in half. Quote the entire speech on the train ride.