Radijojo World Children’s Media Network (in short: Radijojo) is a multi-award-winning NGO connecting children in more than 100 countries. This article provides empirical examples and theoretical reflections of how children worldwide contribute to a culture of Peace, using the power of non-commercial participative media, in the Radijojo framework. The report is based on the methods of Participatory Action Research and Participant Observation. This perspective is inevitably “subjective“; but it offers the chance to give neutral observers relatively rare empirical insights into the peace educational fieldwork on several continents; insights into the complex processes behind this fieldwork for peace, insights that can be triangulated or falsified in follow-up studies. The observation period is the time since the establishment of Radijojo in 2003. This long timeframe allows of more than a decade allows general critical analysis and reflection. However, the main focus is on projects in more recent years.