Abstract : The Polytech'Nice Sophia School and the IFTS of Charleville-Mézières have been organizing an experiment of Co- design for four years. Two students from Polytech'Nice Sophia and one from the IFTS are working in partnership and have to design a communicating object, ie a product that interacts with its environment. This Computer supported cooperative work (CSCW) takes place over a period of three months and is divided into several phases. (definition of the functional specifications of the product, the co-design, the prototype manufacturing and assembly). This paper proposes a back-up on this experience, through its pedagogical, organizational and technological point of views.