This book details the project Digital Citizenship Education for Democratic Participation involving approximately 200 pre-school and primary school children, their families, teachers and community members in the Lisbon locality. The research presented aims to answer the following question: To what extent can a local (and replicable) project, teachers in and out-of-school contexts including families, empower preschool and primary-school-aged children to become active and effective citizens in the digital era? This longitudinal study was organized as a longitudinal and exploratory project inspired by the work of Julian by Sefton-Green amongst other researchers. Through this book the authors share the steps taken along the project, including the main difficulties faced and the solutions found to overcome them as well as project sustainability.