Introduction: arguing the case for participatory research with children and young people -- Developing new methodological understandings of social research with children and young people -- Ethical questions in relation to participatory research with children and young people -- Designing a project with children and young people: investigating the 'researchable question' -- A political ecology of access and cooperation -- Innovative methods -- Issues of impact and sustainability in the context of participatory design and construction -- Publication and dissemination -- Action and participation.