This article presents an empirical study of everyday life in school and a methodological attempt to emphasise children's views and to find ways other than representation to analyse them. The empirical portion took place in a Finnish elementary school in which the author was the class teacher. The ten-year-olds in the class engaged in an unstructured classroom diary activity in which they freely wrote their observations, thoughts and stories. The study takes a relational materialist approach to the children's writings focusing on various moments and gatherings in the classroom as "assemblages" and illustrates how time, things, teacher and pupils are co-produced in them. Temporality and materiality are also considered in relation to research methodologies. Research with children is reconceptualised based on the focus on mattering. The analysis is enacted as a non-linear and nomadic process through retelling and responding to the children's texts. It highlights particular situations, unstabilities, "tiny" things and the complexities of children's lives in educational environments.