Health programs compete for resources and attention, e.g. community-based intervention programs for physical activity vs. skin cancer control. Children’s physical outdoor environments may favorably impact both and several other factors relevant to the health of an increasing number of young children who spend the lion’s share of their waking hours at preschool. The impact of the outdoor environment on physical activity and sun exposure was studied in various landscapes at different latitudes to explore whether outdoor environments with high play potential due to space, vegetation and topography would promote health by stimulating play, increased physical activity, and sun-protective behavior irrespective of location. Based on the findings, criteria were formulated to be applied in local government. In Swedish municipalities land use policies and administrative management of outdoor land use have been adapted to monitoring the quality of preschool outdoor environments (upgrading and planning). New guidelines have been implemented and integrated. Inexpensive methods for assessing, selecting, and upgrading preschool land could be adapted to latitude, climate, and varying outdoor play policies (including gender aspects). Criteria could be explored worldwide. Their aptitude compiled in a database for monitoring and evaluation should further discussed.