This question has been asked a bunch of times in the last couple weeks. Follow the links:
Women and children added to the war effort in crucial ways. There is some overlap here, the lines were not too distinct. Children were involved in "victory" or "liberty" gardens, growing food to supplement the family and allow more to be directed toward the war effort. Women rolled bandages and created packages to give to the men. Some women also took advantage of loosening restrictions to become involved in the Red Cross as nurses.