Catholic theologians have called for a more robust theology of childhood and children in light of global clergy sexual abuse. While affirming the need to develop more substantive theological reflection about children, I express concern that Catholic thought on this topic has been adultist, solely reflecting adults’ perspectives and concerns to the detriment of children. To relate to children justly and engage in theological scholarship that fosters a child-safe culture, theologians must undergo a conversion to a childist orientation and methodology. This article examines how Karl Rahner’s theology reflects adultist aspects common to the broader Christian tradition but also offers positive resources for inspiring conversion. Drawing on Rahner’s theology, Margaret Farley’s account of justice, and my child-centered research, I offer preliminary ideas on the features and benefits of a childist orientation in theology.