The keyword is 'interactive'. In our view, the meaning of the word interactive is: making the user 'experience' a device, 'live' it, 'enjoy' it, learn though it. Or, in a few words, interact with it. In our opinion interaction design should make devices usable, useful and fun, with a double need: to focus on users and their experience and necessities, and to enhance devices distinctive features. So, we think it is necessary always to centre on the two components of the interaction: user and device.