Ethnographic research methods entail an eclectic approach. Individual methods that are commonly used within an ethnographic research study include participant observation, interviews and surveys. These methods can be valuable in gaining a deeper understanding of a particular social group or a specific problem. Recent ethnographic research has frequently involved the use of digital, visual and audio technologies in the practice of such methods. This chapter focuses on mobile digital ethnography and its challenges and potential benefits in conducting research with British Chinese children to understand their health-related experiences. This chapter is informed by three sets of digital ethnographic data conducted with British Chinese children across a six-month period on Indeemo, an innovative online mobile ethnographic platform. This chapter outlines the research design, including the role of the researcher, the focus of the research, data collection and tools and data analysis. The chapter further considers the ethical implications for diversity and inclusion issues of how this form of mobile digital ethnography may engage British Chinese children in reflection, negotiation of identities, resistance to social expectations and in overcoming socioeconomic or cultural challenges in sport, physical activity and health practices.