This paper offers theoretical reflections on how adult researchers access, process and represent the 'worlds' of children and childhood. Recognising previous claims and warnings issued by geographers, it is argued that researchers can and should take advantage of the fact that all adult researchers have once been children, meaning that there are always fragments of connection allowing 'us' at least some intimation of children's geographies as experiencede and imagined from within . Gaston Bachelard's (1969a) 'poetics of reverie' is partially built upon just such a sense of connection, laying out the basis for a phenomenology of childhood wherein adults seek an imaginative revisiting of the reveries--the absent-minded daydreaming--of 'bored' and 'idle' children. This paper provides a critical exegesis of Bachelard's work in this respect, emphasising the importance to his thinking of geography, landscape and environment as both elements within and embodied spurs to childhood reverie. Questions about the admixture of adult imagination and memory in the recovery of childhood reverie are considered, and conclusions are reached about what can usefully be taken from Bachelard's 'poetics of childhood', notably in terms of a methodology of 'not doing too much' as an adult researcher in this field. Claims are also made about needing to take more seriously than hitherto the mundane reveries of childhood, those contained in children's own undirected jottings, drawings and play, as a possible source for future inquiries into children's geographies.