A child´s right´s perspective states children´s rights to be involved and participate in situations that matter to them. Facilitating younger children´s participation in healthcare situations is crucial. Interviews and drawings revealed children´s perceptions as being actors in these specific situations. Parents and professionals were also perceived as actors. This information was used in the iterative development and improvement, with children as co-designers, of an interactive communication tool meant to facilitate child participation in healthcare situations.