Aspects of environmental crisis (industrialization, explosive growth of population and urbanization) have a negative effect on the environment. However, they also impact the mentality of population (for example, urbanization has lead to the decreasing numbers of adults and children having a direct contact with the natural environment). Environmental education and education for sustainable development has developed from the concern of destruction of environment and anthropocentric mentality. Experts are convinced that education based on environmental ethics leads to a quality future. The author analyses the currently valid Curriculum for kindergartens in Slovenia from the aspect of sustainable development. In the second empirical part of the article, the author presents the research that was conducted in order to get the answer to that how the Slovenian kindergartens include sustainable development into daily praxis. (Contains 3 tables.)