This paper describes a method used to elicit an active and specific participation from the child in family therapy. It is based on both a developmental and a social system model. Primarily, this method involves the periodic use of concrete modes of expression and action-promoting situations. These situations are devised to be perceived by the child as play or as task and to be perceived by the adult as a task or as an experiential method used to understand and change the family. The method is implemented through the use of techniques familiar to family therapy. Illustrations of families having a latency-age child are offered.