Data-driven tools and AI applications are present in the daily lives of young children. In Germany, one central objective of education policy is to support children in exploring, understanding and shaping the digital world through appropriate educational programs. However, many teachers lack data and AI competencies. In order to forster the integration of data and AI topics in primary school lessons, we designed a massive open online course for the qualification of primary school teachers.The course either can be integrated in a blended-learning format in university courses or can be self-paced followed by professional teachers. It requires no prior knowledge and provides teaching and learning materials for the forstering of data and AI competencies in different primary school subjects.