In most cases digital learning objects are used for individual learning (reading, looking, playing, quizzes) or by teachers in their class-room or online teaching (presentations). In PILOT project we argue that learning objects should be designed and presented in a special way in order to promote truly social constructivist learning. The project is based on the concept of progressive inquiry learning object templates (PILOTs). These learning objects support progressive inquiry knowledge building process in computer and database supported Knowledge Building environments, found for instance in Fle3 and IVA virtual learning environments. Design research methods such as participatory design and scenario-based design are used in the project to generate distributable and reusable PILOTs. The developed learning objects will be tested and evaluated by schools, teachers, and their pupils. (Contains 4 figures.)