'Co-production' is advocated within UK legislation outlining children and young people's right to be heard and to take part in the development of the services they use. This paper aims to explore understanding and knowledge around engaging with children and young people about how services can be co-produced within education. By using cycles of action and reflection, this research presents what children and young people think is important when working with, and receiving services from, educational psychologists, and explores the experiences of both children and young people, and educational psychologists, as they have worked and continue to work together to co-construct an educational psychology service.