Abstract: Preschool years are the first link in the system of continuous environmental education. At this age, children are particularly sensitive to the perception of nature and the formation of careful attention to the world. The understanding of the preschool period uniqueness for the development of environmentally competent behavior led to the search of some optimal solutions to this important task. The study deals with the psychological and pedagogical conditions of a humane, socially active development of a child, capable of careful, responsible attitude to the natural environment. The special role of adult support during the education is emphasized for the sustainable development. The researchers described the content, the results of experimental work are presented.