Noncommunicative functions of language in children.
D002652:Child Behavior; D002675:Child, Preschool; D003071:Cognition; D003210:Concept Formation; D006801:Humans; D007804:Language Development; D007858:Learning; D008273:Magic; D011340:Problem Solving; D012649:Self Concept; D013060:Speech; D013561:Symbolism