Seminar: Material knowledge in interaction design

Knowing your materials is central to any design work. But what are the materials of interaction design? What types of 'materials' are there? What is special about the materials of interaction design, compared to e.g. furniture design?

Bring your thoughts on these questions.

Also skim through the below paper before the seminar:
The material move how materials matter in interaction design research
http://dl.acm.org.focus.lib.kth.se/citation.cfm?id=2317956.2318029

Structures, forms, and stuff: the materiality and medium of interaction
ny länk

Prototyping: generating ideas or cargo cult designs?
http://dl.acm.org.focus.lib.kth.se/citation.cfm?id=1052438.1052465