This paper is an English translation of a paper published in the German journal Psyche in January 1952. The clinical material concerns a ten-year-old girl who came for treatment because of an irrepressible compulsion to eat. Therapy with the child consisted mainly of playing with puppets. By this method the child was able to express the various events that caused the furtive eating. Zulliger was able to formulate to himself the determinants he believed responsible for the patient's symptoms. However he did not interpret or verbalize this material to the patient. Zulliger believes that it was necessary only to indicate to the patient that he understood her problems. He calls this kind of therapy 'pure play therapy'. His rationale for this procedure is the fact that the unconscious of the child is 'magical, prelogical, and not yet intellectual or rational', and we therefore do not have to verbalize our interpretations to a ten-year-old child. Apparently 'pure play therapy' is very different from child psychoanalysis.