This course introduces students to current issues, concepts, methods and tools for prototype creation in human-computer interaction (HCI). The course's central theme and question is how different interaction contexts create different prerequisites for prototyping as part of the design work. The course includes both theory and practical methods, as well as tools for creating prototypes. The course touches on areas such as digital fabrication, virtual reality, graphical user interfaces, interactive locations, and platforms for creating prototypes of interactive objects. Through theoretical and applied work, the course provides perspective on the role of prototypes in both research and practice.