Purpose of the research: Co-constructed digital storytelling methods have the potential to provide authentic children’s perspectives for planning health and education support. The Our Stories project investigated how this method can be applied with autistic children and young people (CYP). A year-long sub-project supported four autistic CYP in a mainstream secondary school in the UK to create short videos illustrating how they manage their sensory and emotional experiences during the school day. The CYP were supported by a member of the Special Educational Needs and Disabilities team, a specialist autism teacher, a researcher, and filmmakers from a disability-led community interest company. This paper reflects on how we can authentically co-construct digital stories with autistic secondary pupils. Major findings: We identified two broad messages for genuinely participatory research. The first was how the structure of sessions changed, from an initial assumption of imposing structure to achieve the research aims to the negotiation of a messy, more fluid means of working to suit the CYP’s needs and wishes. Second was a change in the intended purpose of the stories, from a product to support reflection and understanding about emotional regulation, to each CYP’s own unfolding of purpose. Conclusion: We draw out general implications for co-construction in participatory research in terms of awareness of how to work with power relations in ways that keep the young person at the centre of analysis, and which recognise the need for space for CYP to construct their own meanings.