ATC presentations
As the author of ABC Air Traffic Control I have given many presentations on ATC for the layman audience.
I give a PowerPoint presentation explaining in simple terms the point at which your holdiay flight starts - a flight plan to Eurocontrol, approval to Swanwick, then to your local airport, how radar identifies your flight by its squawk, controlled and uncontrolled airspace, ATC principles etc using plenty of photos and ATC recordings of humourous events to show it's not always a serious business.
I have always had a good reception and calls for more!
Graham