Welcome to ACM TEI'18, the 12th International Conference on Tangible, Embedded and Embodied Interactions, hosted at KTH, Royal Institute of Technology, in Stockholm, Sweden, from the 18th to the 21st of March 2018. This is TEI's first visit to Scandinavia The TEI conference series is dedicated to issues of human-computer interaction, novel tools and technologies, interactive art, and user experience. This year's conference focuses on the...