Youth Advisory Boards (YABs) are a youth engagement strategy used by organisations, programmes, and researchers to help incorporate the views and ideas of young people into their work. Incorporating children and young people in the research process is beneficial for all the parties involved: researchers, children and young people, as well as the research output itself. This prevents research from being fully adult centric, skewed towards adult priorities, and uninformed of the contribution that young people can make. Growing Up in Digital Europe (GUIDE) is a comparative longitudinal birth cohort survey measuring children’s and young people’s wellbeing across Europe. Parts of the GUIDE study are co-created by children, policy makers, and scientists. Since its inception, child-centric approaches have been foundational to GUIDE. As such, children have been placed at the centre of GUIDE’s ongoing work from the beginning, during the design and preparatory stages of the research. This chapter provides an overview of the development of GUIDE’s YABs, followed by a discussion on the challenges encountered and potential solutions moving forward.