Through sketches, mock-ups and early prototyping designers engage in a “conversation with materials” (Schön 1983). In the formation of a new idea the material starts to “talk back”, revealing new opportunities and challenges. Computer technology is a complex material for many designers to work with (Kursat Ozene et al. 2010). It is a material both in space and time (Hallnäs and Redström 2006). It is not enough to touch and feel the material in any given moment and thereby getting to know its properties and potential, but instead it reveals itself and its dynamic feel when put together into a running system.