The implementation and development of multimedia devices intended for the general public raises many questions among designers. Drawing on an experiment conducted in 2006, we present in this paper the different multimedia systems put in place. Both the design phase and the operational phases are questioned, with the usability and affordance frameworks as the analytical framework. We also propose to enhance the user-friendliness of the devices so that they can be more efficient and effective. This reflection aims to identify guidelines for multimedia applications intended for the general public, and in particular children.