The purpose of the study was to examine educators perspective on work with sustainable development in preschools and as well how they perceive childrens learning based on a complete material for the problems of littering at lakes and streams. In order to implement the study I have performed qualitative interviews and observations. The results showed that the preschools in the survey do not actively work with the problems of littering at lakes and streams but they will raise the subject if interest from the children reveals. Littering at lakes and streams is not something familiar to the participants in the study, but they consider that there are opportunities to work with the problem in the preschools. However, the study showed that other topics within sustainable development that were more visible to them were prioritized. Furthermore, the results from the observations show that educators find that a completed activity material is a good way of creating an interest in sustainable development for the preschool children.