In this article, we explore how ‘family’ is conceptualized and negotiated in a Mexican and a Chilean child protection institution. We draw on empirical material from two qualitative studies, employing a multi‐method approach. By using a theoretical framework from family sociology, we explore how ‘family’ is done and displayed by families of children in residential care despite socio‐economic, structural and institutional constraints. These displays consist mainly of ‘little things’ of a mundane character, such as homemade food, sweets, gifts, clothing and family photos, and more intangible displays as family narratives, affection and parental responsibility. The empirical material reveals how professionals commonly disregard these displays in favour of ‘big things’ such as housing, employment, nuclear family structure, therapy and parental school attendance. The professionals' recommendations and decisions in child custody cases can be interpreted as recognitions or rejections of family displays, as the acceptable limits of unconventionality are legally, socially and culturally drawn.