T h e in c lu s io n of the child in therapeutic procedures de­ signed to help him with his behavior difficulties has stimu­ lated students in this field to study the nature and purpose of his participating activity. The considerable body of litera­ ture that has developed on this aspect of therapy has cen­ tered mainly on the therapeutic value of play, the child’s most natural medium of expression. Since it is essential to provide a child with the opportunity to use his natural tools and modes of expression, we see at once that play activity is an important factor in therapeutic work with children.