Eight practitioners in the Growing Up in Cities project of UNESCO reflect on what they have learned in terms of how to move government officials and leaders of civil society to view children and youth as partners in creating livable cities. They describe their experience in participatory action research with children and youth, how they achieved successful outcomes, what they learned from mistakes, and strategies that they would apply if they were beginning a new initiative to ensure that city officials, community leaders and donors integrate young people into decision-making. The conclusion summarizes the group’s shared wisdom regarding how to make certain that adults in power not only listen to young people but also take action on at least some of their recommendations. These reflections should have relevance for any action research project with young people.