Volunteers are an integral part of Hattie Larlham's care for children and adults with developmental disabilities. There are many ways to volunteer your time at Hattie Larlham. Below is a selection of current Hattie Larlham volunteer opportunities. If you, your group, organization or company would like to volunteer at Hattie Larlham, contact the volunteer department. There are youth, teen and adult Hattie Larlham volunteer programs and see what Hattie Larlham volunteers will be up to on the volunteer calendar.