The First Kids of U.S. presidents dictate fashion trends, jet set around the world meeting dignitaries, and sometimes host senior prom in the White House East Room. You know, normal kid stuff. But when dad's term is up and the First Family departs 1600 Pennsylvania Ave., the spotlight typically turns away from them. To celebrate the Fourth of July — which happens to be Malia Obama's birthday — we checked out what the First Children are up to these days. ________________________________________________________________________________________________________________________________________________________________________ Caroline Kennedy serves as the U.S. ambassador to Japan. Last fall, Caroline Kennedy landed a role perfectly suited to...