Mobile learning is a primary learning format in the education of young children from birth through 6th grade. This format has been found to have a positive impact on the academic achievement, self-efficacy, motivation, and learning attitudes of students, including those with special needs (Ciampa, 2014; Hwang, 2014; Nikou & Economides, 2018; Xie, Basham, Marino & Rice, 2018). In both formal and informal learning contexts, mobile learning affords opportunities to innovate and explore new forms of authentic experiences, meaning-making, and creativity with untethered technology (Choi, Land, & Zimmerman, 2018; Schuck, Kearney & Burden, 2017). This edited book acts as a springboard to expand discussions surrounding how mobiles might best be situated in contexts relating to young children. With a focus on early childhood and elementary settings, this book both expands the definition of mobiles to encompass digital-physical tools (e.g. Osmo, probeware) and wearables. It also provides insight into how intentional integration of mobiles supports the development and practice of both in-service and preservice teachers working with students in early childhood and elementary settings.