In Kazakhstan today, the ethnic identity of children from mixed marriages is of particular interest, as changes in social and political life have brought new changes in the minds of young people over the years. This article addresses some of the issues of ethnic identification and self-identification of children from inter-ethnic marriages. New features in the formation of ethnic identity have been identified. If a decade earlier, young people from inter-ethnic marriages - by self-determination - were Russian-speaking and closer to the Russian-speaking environment, regardless of the entry in the documents of the Kazakhs. Nowadays - modern young people of mixed origin define themselves as Kazakhs, regardless of what is written on documents by Russians and Germans. The reasons for such interesting changes are in the gradually changing of socio-political and cultural situation of our society. Greater emphasis on the Kazakh language of education for mestizos, parents linked to the awareness of the future of children and their success in society.