The child archetype is portrayed in literature in various ways. For other senses of this word, see archetype (disambiguation). ...
It can take the form of an adult who displays child-like qualities (e.g., the character Raymond in the film Rain Man) or a young child who might give wise advice to their friends. Rain Man is a 1988 film which tells the story of a selfish yuppie who discovers that his father has left all of his estate to the autistic brother he never knew he had. ...
The phrase poster child originally referred to a child afflicted by some disease or deformity whose picture is used on posters to raise money for charitable purposes; "she was the poster child for muscular dystrophy".
Poster child is also the nom de plume of a street artist who is best known for his Mario Blocks project, the purpose of which is to install homemade Mario blocks in public spaces.
Ryan White was considered a poster child for societal acceptance of AIDS, after he contracted the disease from a blood transfusion and was expelled from his school.