Young John F. Kennedywas a mischief maker, but he also had a serious side. He cared about people's problems and, with his words, could easily persuade others to go along with his ideas. As he grew up, Kennedy's family decided that he was meant for great things -- the presidency of the United States. TIME For Kids® Biographies help make a connection between the lives of past heroes and the events of today.Kennedy's desire to help Americans -- and others around the world -- is as important now as it was forty years ago.