This workshop explores the many roles children can play in the design of technology for their own use. Much literature has reported on how children have been mainly playing co-designer roles. By looking closer it emerges that children have mostly been involved in the ideation phase of design. More rarely were they actively engaged in other design phases e.g. conducting Contextual Inquiry, elaborating User Data Analysis, producing Personas, preparing Sketches and Story Boards and crafting Low and High resolution Prototypes. When it comes to evaluation, children are still mostly considered as final users while only rarely are they invited to run heuristic evaluations or even to have a more active role during the process. We would like to invite all relevant stakeholders: researchers, teachers, parents, and of course children, to share their experiences. The purpose of the workshop is also to bring their open questions and requests for guidelines and suggestions as to when and how to involve children in the various process stages. We hope to produce good definitions of the many roles children can play as co-researchers as well as to explore the benefits each participant will get from engaging with the overall design experience.