Child psychotherapy has been an underdeveloped area of study. Existing studies have focused primarily on the efficacy of behavior modification and cognitive-behavioral techniques, whereas other approaches, such as psychodynamic play therapy, remain underinvestigated. This study applied single-case research methodology to clinical material derived from transcribed therapy sessions of a child referred for psychodynamic play therapy. Analyzing the data from actual clinical sessions allows for the study of the psychotherapeutic process, which, in this case, centered around the relationship between the therapist's interventions and the child's progress in expressing emotions.