title: Pleasure derived by children from cognitive challenge and mastery.
mesh_terms: D000124:Achievement; D001288:Attention; D002648:Child; D005260:Female; D006240:Happiness; D006801:Humans; D007389:Internal-External Control; D008297:Male; D009042:Motivation; D010553:Personality Development; D011340:Problem Solving; D012904:Smiling