This paper presents the Kajkavian speech of Zlatar and a possible way of introducing early and preschool children to this speech. For this purpose, a project on Zlatar's speech was carried out and presented here in the kindergarten. The first part of the paper talks about the Croatian standard language and dialects and explains in more detail the history and prevalence of the Kajkavian dialect. Standard language is a special form of language, it is an official way of communication, it is obligatory in public communication, but everyone can notice that people in smaller communities communicate with the local language as an organic idiom in an area. Local dialects are a natural and ubiquitous phenomenon of regional linguistic diversity. The second part of the paper explains the phenomena of speech and language in more detail, and further presents the development of children's speech in early and preschool age. As Croatian-speaking children are vertically bilingual, the phenomenon of the interlingual field is presented in more detail as a phenomenon of influence between different idioms (specifically, the Kajkavian dialect and the Croatian standard language) that occurs in children's language development. The third part of the paper is a presentation of the project in kindergarten. Participants are preschool children, a year or two before starting school. The paper describes the activities carried out within the project and the results achieved. The project confirmed the possibilities of presenting and nurturing native topics in kindergartens, was well received by children and thanks to it children became aware of the differences between the standard Croatian language and the Kajkavian dialect and the role of the Kajkavian dialect in communication. Along with this project, the children got acquainted with their native culture.