Childhood studies have argued for the social construction of childhood, respecting children and childhood in the present, and recognising children's agency and rights. Such perspectives have parallels to, and challenges for, disability studies. This article considers such parallels and challenges, leading to a (re)consideration of research claims to represent children's "voices" and the current promotion of children's participation as researchers. It concludes how research with disabled children encourages due account of multiple communication methods to access, analyse and present research, and being more reflexive about assumptions of competency, expertise and agency in the roles of researcher and research participant.