Free is a physiotherapist undertaking a PhD looking at co-designing a circus based intervention to improve participation for preschool aged children born preterm. She has undertaken a scoping review to understand how circus is being used as a health intervention currently, a mixed methods study exploring key stakeholders experiences of participating in physical activity (including parents of children born preterm), a co-design project with key stakeholders to design the intervention to meet the needs identified in the prior studies, a mixed methods evaluation of the co-design process, and a feasibility trial of the co-designed intervention.