Play--the language of children.
D000374:Aggression; D002653:Child Behavior Disorders / Q000628:therapy; D002675:Child, Preschool; D003142:Communication; D003220:Conflict, Psychological; D005260:Female; D006801:Humans; D008297:Male; D010989:Play Therapy; D010988:Play and Playthings; D011386:Projective Techniques