Participatory research is increasingly being perceived as a democratic and transformative approach to social situations by both academics and policymakers. The article reflects on what it means to do participatory research, what it contributes to broader knowledge building, and why mess may not only need to be present in participatory research but encouraged. The purposes of participation and mess as nourishment for critical enquiry and more radical learning opportunities are considered and illuminated using case study material from the Family Based Positive Support Project.