Martha,
Besides child psychologists, teachers, preschool directors, social workers, physical therapists, nurses, and sports and recreation managers work with children. There are other types of therapists as well that do, like speech therapists or audiologists. Human or child development is a good major in college before any of those graduate school programs. You could also pursue a bachelor’s degree in education or a bachelor’s of social work to be prepared to get a job before earning a graduate degree, which practicing as a child psychologist would require.