The work is devoted to the topical problem of linguoculture. The subject of the research is cultural codes in children's discourse based on the materials of the living speech of Russian children on the site "Children Speak". For the research general scientific methods of analysis and generalization, descriptive and contextological methods, the method of linguoculturological and ontogenetic analysis are used. As a result, the linguocultural and linguosociological aspects of the formation of a child's linguistic personality are considered. At the same time, attention is focused on identifying the peculiarities of Russian children's discourse in the linguocultural aspect, studying the ethnocultural determinants of creating the linguistic personality of children. Based on the results of the analysis, it was concluded that the national culture is one of the decisive factors affecting the speech activity of children. In the process of mastering the native language, the child simultaneously acquires a special national mentality and creates a system of values that coincides with it, such as patriotism, the symbolic meaning of animal archetypes, attitude towards the family, etc. Moreover, under the influence of a child's linguistic personality, a certain deviation from the usual national worldview is also manifested in children's discourse.