This chapter focuses on the methodological prospects of using Conversation Analysis (CA) in research on children’s ethical and moral decision-making. We will first introduce some of the previous literature on children’s ethical and moral development and the related decision-making. Then we provide an overview on the acquisition of interactional competence, followed by the intersections of choice making and interaction. Then we will introduce CA as a methodological and analytical approach, followed by our present focus within it, and the empirical application of the apparatus into a video recorded data gathered within Finnish Early Childhood Education and Care (ECEC) contexts. Finally, we conclude by reflecting on the possibilities for using CA in the present and future research in the area.