Being a royal family member certainly has its perks. Prince William and Kate Middleton on Friday took all three of their children — Prince George, 9; Princess Charlotte, 8; and Prince Louis, 5 — on a royal outing to a Royal Air Force station.The royals got the chance to look at the insides and outsides of a variety of planes as preparations are being made for this weekend's Royal International Air Tattoo show, the world's largest military air show. The mood seemed to be a mix of excitement and deference as the family also explored the exact C-17 transporter aircraft that flew the body of Queen Elizabeth from Edinburgh — which is near Balmoral Castle, where she passed away last year — back to London.