Each nation has many people who voluntarily take care of others. For example, many high school and college students in the United States often spend many hours as volunteers in hospitals, orphanages or homes for the aged. They read books to the people in these places. Sometimes the students just visit them, play games with them or listen to their problems. Other young volunteers work in the homes of sick or old people. They clean up their houses, do their shopping or mow their lawns. For boys who no longer have fathers, there is a voluntary organization called Big Brothers. College students take these boys to baseball games and help them to get to know things that boys usually learn from their fathers.