This paper presents observations of boy and girl twins on a neonatal intensive care unit, following them through from 10 days old to return home. The observer hypothesizes about the experience of the twins as they progress, based on detailed notes of their actions. The preoccupations of the parents are incorporated, as are reactions and interventions of staff. The place and possible functions of such observation by a child psychotherapist attached to such a unit are elaborated in the concluding section.