In early childhood education, the integration of science, technology, engineering, arts, and mathematics (STEAM) are advocated as contemporary educational goals. However, integration of STEAM is not defined in the early childhood context. We claim to 'integrate' and 'devise integration pedagogies', but there is still no clear-cut message on what integration means and how to do it. This paper presents an integrative literature review to conceptualize the integration of STEAM practices in early childhood education. The review highlighted key factors and challenges relating to STEAM integration. The paper concludes with the development of the integrating and navigating STEAM (inSTEAM) conceptual framework derived from the concepts, empirical research, and theories explored in the integrative review of the 17 articles.