Children in Western countries spend only about 20% of their waking time in school (Meltzoff et al., 2009). Leveraging the 80% of time that they spend outside of school can provide children with opportunities to engage in meaningful, authentic STEM learning experiences with family members, other caregivers, and children. STEM learning and readiness go beyond acquiring content knowledge to include interest, engagement, and motivation for STEM learning as well as the formation of a STEM identity. To date, there has been a dearth of research focusing on children’s informal STEM experiences when compared to formal, school-based STEM learning experiences. This Research Topic focuses attention on the authentic, everyday experiences of children and how these experiences provide opportunities for STEM learning, engagement, and identity. In addition, these papers will explore how these everyday experiences can be leveraged and augmented to promote STEM learning and engagement through culturally-relevant design and implementation.