The article presents the results of an interdisciplinary and integrative study of creativity and creative activity in high-school students. The authors attempted to describe the abovementioned phenomenon considering the influence of a traditional large Kalmyk family, ethnical-cultural identification, self-actualization, role and functions of social environment, including the type of educational institution and extracurricular education. The study employed an innovative psychological diagnostic system that included authors' original developments. The obtained results can be extrapolated not only to the studied region (Republic of Kalmykia) but also to other territories with multiethnical and ethnical-cultural population. The study allows expanding the scientific knowledge about creative skills in the youth, their psychological diagnostics and stimulation of their development.