The Narcissistic Personality Questionnaire for Children (NPQC) is a brief self-report scale for measuring narcissism in children. In Study 1, a factor analysis on 370 children's NPQC scores revealed four factors that were labeled superiority, exploitativeness, self-absorption, and leadership. Study 2 established convergent and discriminant validities of the NPQC. NPQC scores were positively correlated with need for power/dominance, self-esteem, aggression, and need for achievement, and unrelated to life satisfaction, as expected. Further support for the validity of the NPQC was obtained when findings were consistent with attachment theory's interpretation of narcissistic children's self-perceptions. Study 3 investigated the temporal stability of scores. Results from Studies 1 and 3 show the NPQC to be an internally consistent measure (Cronbach alpha = .81) and to have adequate test-retest reliability (r = .81). Implications for the education of aggressive and narcissistic children are discussed. (Contains 5 tables.)