A toddler might have become the youngest person to reach the summit of Piz Badile, a 10,000-foot mountain. His reward? Haribo candy. Jackson Houlding, the 3-year-old who completed the impressive feat, trekked up the mountain, on the border of Switzerland and Italy, with his family last week. His sister Freya, 7, is reportedly now the youngest person to climb the mountain unaided.