In the Estonian Education 2035 vision document, well-being is defined as a process that manifests in people’s overall sense of self-efficacy and in harmonious relationships with the social, natural, spiritual, and technological living environment. Oliver Nahkur, a member of the Well-being Research Group, introduces a newly launched research and development project titled “Creating a Conceptual Model of Children’s Well-being in Estonia and Developing Its Indicators.” Dagmar Kutsar, in turn, discusses the multidimensional approach to well-being (including individual agency and co-creation of well-being across different levels of societal functioning and areas of social life). She invites reflection on the applicability of the recently developed interdisciplinary well-being model—spanning the life course and various domains—in striving toward human flourishing.