Hot air balloons
Talk about experiences with hotair balloons, the history (used in war, first extended flight, etc.), the use in weather forecasting. Letting them up: wind conditions, open area, unloading it, pulling the balloon out, blowing it up, getting the burner out (hot singed hair) Watching the balloon go up, chasing it, landing, rough landings, surprised/angered the people whose property you landed on, loading it back up, tiring.
Weather needs to be cool or else the balloon will not rise.