title: Social class, intelligence and the development of children's play interests.
mesh_terms: D001288:Attention; D001887:Boredom; D002675:Child, Preschool; D003405:Creativity; D006801:Humans; D007360:Intelligence; D007361:Intelligence Tests; D008297:Male; D010988:Play and Playthings; D012923:Social Class; D013997:Time Factors; D014705:Verbal Behavior