What does not all there mean in the story the scarlet ibis?

In "The Scarlet Ibis" by James Hurst, the phrase "not all there" refers to the character Doodle, who is physically weak and has a mental disability. This phrase highlights how Doodle is perceived by others as being different and less capable due to his limitations. It underscores the themes of acceptance and the complexities of familial love, as Doodle's brother struggles with feelings of pride and shame regarding Doodle's condition. Ultimately, it emphasizes the tragic consequences of societal expectations and the desire for normalcy.