The rise of the Internet of Things (IoT) brings abundant new opportunities to create more effective and pleasing tangible user interfaces that capitalize on intuitive interaction in the physical world, whilst utilizing capabilities of sensed data and Internet connectivity. However, with these new opportunities come new challenges; little is still known how to best design tangible IoT interfaces that simultaneously provide engaging user experiences and foster a sense of understanding about the often-complex functionality of IoT systems. How should we map previous taxonomies and design principles for tangible interaction into the new landscape of IoT systems? This workshop will bring together a community of researchers from the fields of IoT and tangible interaction, in order to explore and discuss how parallels between tangible interaction and the properties of IoT systems can best be capitalised on as HCI research moves increasingly toward the Internet of Tangible Things (IoTT). Through ideation and discussion, the workshop will function as a springboard for the community to begin creating new taxonomies and design considerations for the emerging IoTT