Pakistan, Dec. 27 -- Prince William and Kate Middleton's children once again charmed royal watchers as they joined the family for the traditional Christmas Day walk to church at Sandringham, where a heartfelt moment between siblings quietly stole the spotlight.

Prince George, 12, Princess Charlotte, 10, and Prince Louis, 7, greeted well-wishers after the festive service, exchanging smiles, handshakes and warm wishes of "Merry Christmas." The young royals were showered with gifts and flowers, with aides helping manage the growing pile as the children moved along the crowd with confidence and ease.

One particularly touching exchange unfolded when royal supporter John Loughrey spoke to Prince George about his recent public engagement at Th...