The Duke of Cambridge showed his son the inner workings of a helicopter and the cockpit of a Red Arrow Hawk as the family enjoyed a trip to the Royal International Air Tattoo at RAF Fairford.
George waved to waiting crowds as the family arrived at the airfield and pointed at planes flying above the site.
Prince George wore blue ear defenders as William and the Duchess of Cambridge toured the world's largest military air show.
They met members of the Red Arrows display team in front of a Red Arrow Hawk, shortly before they took part in the show.
And George got a closer look at a Squirrel helicopter - the same aircraft William trained in while he was based at RAF Shawbury in 2009.
William climbed into the instructor's seat of the cockpit of the aircraft while Kate and George sat together at the back.
Kate, wearing a blue Stella McCartney dress, black jacket and nude heels, put on a gold hairband after stepping on to the blustery airfield.
She is patron of the Air Cadet Organisation, which is celebrating its 75th anniversary, and met cadets who have spent the past week erecting tents for the Gloucestershire event.
This year's event, from Friday to Sunday, will feature the international display debut of the Lockheed Martin F-35B fast jet.