This article examines the benefits and challenges of engaging children in environmental citizen science, defined as science conducted by nonspecialists under the direction of professional scientists, to promote social good. Citizen science addresses two central elements of the social good model—environmental justice and inclusion with particular attention to diversity in age, gender, race/ethnicity, and social class in addressing environmental injustice that is more prevalent in underrepresented communities. This article evaluates how participation in citizen science projects focused on the environment (eco-citizen science) benefits the child’s development, contributes to science, and leads to commitment to environmental stewardship and justice as adults. Our work offers a novel contribution to the discourse on social good and social justice through explicitly calling for children to be included in environmental citizen science projects. We examine the benefits and challenges of involving children in scientific projects and discuss implications for policy, practice, and future research