At the age of 43, Jack Kennedy became the youngest ever president-elect. Jacqueline Bouvier Kennedy was the youngest first lady, and together with baby John Jr. and 3-year-old Caroline, made up the youngest family to live in the White House. When the 35th president was sworn in on January 21, 1961, the children were safe at home with their nanny. Despite the spotlight and luxurious surroundings, Jackie was determined to give them a normal childhood, and even the secret service personnel were not allowed to pamper them.