This contribution outlines approaches to the integration of didactic principles and educational research into science outreach in archaeology and cultural heritage. The focus lies on the target group's conceptions prior to involvement with the outreach programme and the development of learning objectives. The chapter gives insights into the author's PhD project at Kiel Science Outreach Campus, a joint venture of Kiel University and Leibniz Gemeinschaft. The project combines an educational research agenda with the development of a mobile learning environment including elements of spatial games on basis of didactic principles. The chapter concludes with a demand for a more frequent application of didactic principles by those who are involved in the planning and implementation of public outreach in archaeology and cultural heritage as well as for the consideration of the boundaries of scientific knowledge in connection with outreach activities.