Room for One More (1952)

Anne and "Poppy" Rose are the average American family, with three quirky kids. Anne has a good heart and takes in lost cats and dogs--and one day, also an orphan named Jane, a problem child who has already attempted suicide. At first Poppy is worried and wants to get rid of her, but with love and patience they finally manage to integrate her into the family. Just then Anne invites another orphan, aggressive handicapped Jimmy John, to their summer vacation.