Briefly explain the self-concept.

Answers will vary. The sense of self, or the self-concept, emerges gradually during infancy. Infants and toddlers visually begin to recognize themselves and differentiate themselves from other individuals such as their parents.
In the preschool years, children continue to develop their sense of self. Almost as soon as they begin to speak, they describe themselves in terms of certain categories, such as age groupings (baby, child, adult) and gender (girl, boy). Self-definitions that refer to concrete external traits have been called the categorical self.