Materials can be considered as the interface of a product, as they mediate between user, environment and object. Developments in material science (e.g. regarding soft robotics, kirigami, meta materials or bio-based materials) and novel shape actuators that serve as both input and output, expand the opportunities for interaction design. Inspired by these trends, Interactive Materiality takes a speculative approach to how interfaces could change into and retain arbitrary shapes so as to display output from the system or afford new actions. By studying and discussing underlying theories and through a material-centered design approach, students will learn to create interactive material experiences using available technologies. They will need to demonstrate their competence by designing an interactive showcase that illustrates how interaction with these novel materials could be (without a specific application, user or context in mind).