A Prodigy

1. (now rare) An extraordinary thing seen as an omen; a portent. [from 15th c.]
2. An extraordinary occurrence or creature; an anomaly, especially a monster; a freak. [from 16th c.]
3. An amazing or marvellous thing; a wonder. [from 17th c.]
4. A wonderful example of something. [from 17th c.]
5. An extremely talented person, especially a child. [from 17th c.]

(extremely talented person): wunderkind, girl wonder, girl-genius, boy-genius, boy wonder, child prodigy.