A mentally retarded person is slow to learn things and may be slow in other ways, such as talking, seeing, hearing or can't run and jump like other children. But they have feelings just like you and I, and they need approval and friendship just like we do. Some children with mental retardation are able to learn many things. It just takes them longer. But they eventually learn enough things so that they can grow up to be like other adults.
Some children are never able to learn certain things, like counting money, reading, etc.
They might need help all their lives to make good decisions and do everyday things like paying bills, keeping clean and doing housework. Anyone who cares for others can help those with mental retardation. Be their friend. Tell them when they are doing a good job. Many children with mental retardation learn better that way.