Andresen began her work with the
YWCA in Detroit and also became the director of
Camp Talahi. During the rest of the year she did a lot of inner-city work in Detroit. In 1942 she purchased a large farm house on 82 acres near
South Lyon, Michigan; this would become known as Pinebrook. It was transformed into both a summer camp and a hostel for international travelers year around. Andresen met her second husband, Arvid Andresen, a Danish landscape architect, who was on excursion and stayed at the hostel. On a late-1940s trip to Europe she pondered how to heal the damage done by World War II. Andresen became involved with the
Michigan Council of Churches. Andresen was apprehensive of how well the concept of American families taking in students of a former enemy would be received. She managed to place all the students, many of whom barely had enough clothes to fit into one small suitcase. At the beginning of the school year they stayed at Pinebrook before they went to their host families to attend high schools in various communities in Michigan. At the end of their academic year they stayed at Pinebrook again, speaking English and having been enveloped by American culture. ==Youth for Understanding==