Through stories of young girls at play produced in a collective biography workshopwe trace flows of desire and excesses of joy, and bring recent feminist work on positiveaffect into our analysis of girlhood becomings. Ringrose (2011, 2013) arguesthat the concept of the Ã¢Â€Âœaffective assemblageÃ¢Â€Â� brings together affect, embodiment,and relationality in powerful ways to enable a mapping of how desire movesthrough the social. She suggests that the affective capacities of assemblages can beÃ¢Â€Âœlife affirming or life destroyingÃ¢Â€Â� (2011: 602). In this article we are interested inmapping flows of desire, moments of joy and possibility in moments of girlhood,and in the limitations and contingencies within these moments that shut downthese possibilities. We suggest that the methodology of collective biography(Davies and Gannon 2006, 2009, 2013) offers potential for tracing the microparticularsof girlhood becomings.