The conservation of number, mother, water and a fried egg chez l'enfant.
D001244:Association; D002648:Child; D002657:Child Development; D002675:Child, Preschool; D003071:Cognition; D003210:Concept Formation; D003463:Cues; D004493:Education; D005260:Female; D006801:Humans; D007062:Identification, Psychological; D008297:Male; D012691:Serial Learning; D012858:Size Perception