The aim of this thesis is to explore preschool naptime during the period 1910–2013 through visual materials, films and photographs produced by different actors for various purposes at various historical times, and to develop a visual methodology that works with complex visual materials. Even though naptime is central to everyday life in preschool, it is an activity that is rarely a focus of Early Childhood Education research. The empirical data derives from two separate but interrelated studies, the first a video ethnographic field study and the second an archival ethnographic study. Both studies include films and photographs that visualise the material environments and social interactions that take place during preschool naptime. A theor...