In Interaction Design, we are presented with an opportunity to return to the designed object as a subject of enquiry with a new perspective. We suggest a reconsideration of form as the starting point for developing a deep understanding of computational things and an approach to dealing with their inherent complexity. Understanding the object as composed of both spatial and temporal form, we can use materials to design a 'surface' for experience that extends beyond the three-dimensional object. Presenting both theoretical considerations and design examples, we discuss the potentials of a new perspective on form as a basis for design research and education.