Starting kindergarten is one of the most difficult moments in the life of a small child and his family. It is a period of life, which is usually accompanied by fear, uncertainty and general stress. For the past three years, children and their families, in addition to a new turning point in their lives, had to face a new situation in the world - the Corona virus pandemic. The Corona virus pandemic has significantly influenced changes in work with children in the context of early and preschool education. In this context, it is important to look at and analyze the quality of work in specific situations, especially with situations of transition from family to kindergarten and the quality of adaptation in children, which was the main goal of this study. This thesis is part of the project „Children's well-being in transition periods: The empirical validation of Ecological-dynamic model“, whose mentor is dr. sc. Sanja Tatalović Vorkapić. For the purpose of creating study and analyzing the quality of work of kindergartens during the Corona virus pandemic, children, parents and teachers of a kindergarten in Karlovac were examined. A total of 175 people participated, of which 57 were early age children, 54 parents and 64 teachers. The analysis of the data showed that children of early age accepted the kindergarten well, that they are not afraid of virus and that protective masks did not pose a problem for them. On the other hand, parents and educators experienced the situation of children's adaptation to kindergarten differently. The quality level of children's adaptation to kindergarten was rated satisfactory by the parents, while the educators rated it as a lower level, i.e. moderate. In conclusion, the thesis largely mentions the cooperation of all participants in the educational process (children, parents, teachers), which is in line with the model of Ecological-Dynamic Effects, authored by Rimm-Kaufman and Pianta, on which the entire study rests.