poster child

Etymology
From the usage of appealing young people and children in charitable advertisements.

Noun

 * 1)  One who is a prototypical or quintessential example of something.
 * He's a poster child for militant vegetarianism.
 * He's a poster child for militant vegetarianism.

Hypernyms

 * Thesaurus:exemplar

Translations

 * French: figure emblématique
 * German:
 * Japanese: (lit. poster daughter)
 * Swedish: