The worlds youngest people who made a difference in the world.
In psychology research literature, the term child prodigy is defined as person under the age of ten who produces meaningful output in some domain to the level of an adult expert performer. Child prodigies are rare; and, in some domains, there are no child prodigies at all. Prodigiousness in childhood does not always predict adult eminence.
The term Wunderkind is sometimes used as a synonym for prodigy, particularly in media accounts. Wunderkind also is used to recognize those who achieve success and acclaim early in their adult careers. (source : wikipedia)