On behalf of SKL (Sweden’s municipalities and county councils) and together with our partners from Structura Concept (www.structuraconcept.com) and EstHus (www.esthus.eu), we worked on the development of four different types of “concept pre-schools” during the second half of 2019. A design based on a generic grid system allows consistent planning and control over resource consumption to create the most efficient space for greatest number of children. Mass timber construction system (MHM) technology guarantees very healthy play and work environment and low operating costs.