This article focuses on preschool teachers' collegial learning in relation to children's use of digital learning tools in preschool. The aim of the study was to investigate how preschool teachers understand, change, and improve learning situations when digital tools are used, under the supervision of a film educator, a preschool colleague, and a researcher. The results show how five dedicated teachers, without a special interest in digital tools, started using tablets in preschool as a learning tool to achieve the goals in the curriculum regarding communication. The experiment model used in the study is based on design-oriented theories. The design-based experiment provided an opportunity for in-depth reflection among the teachers and a meeting place for collegial learning processes, which can in turn lead to preschool development.