School-based social activism projects have much potential to foster civic engagement, self-efficacy, and positive youth development. Social activism projects may also be a means by which children, a group that is disempowered due to their age and dependence on adults, might seek to positively impact social and community problems. The current study evaluated elementary school age children's (K-7th grade) participation in grassroots campaigns, which are year-long school-based activism projects that are a component of their school's comprehensive social justice curriculum. Results found that even young children could successfully and meaningfully participate in these school-based activism projects. Additionally, students' participation in these projects was characterized by a high level of enthusiasm and also facilitated a sense of community and empowerment in these children.