The Boy with Green Hair (1948)

Peter Frye, typical American boy, is orphaned when his parents are caught in the London Blitz. He is not told of their fate, but shuttled from one selfish relative to the next, ending with "Gramp," a kindly ex-vaudevillean. Peter and Gramp, both fond of "Irish bulls," get along fine; but the morning after Peter finally learns he's an orphan, his hair spontaneously turns green! The absurd over-reactions of stupid people overturn his life as the story becomes a parable.