Ключевые слова: achievement, background, blackboard, boy, brain, bulb, chalkboard, child, childhood, children, clever, concept, creative, education, elementary, eyeglasses, glasses, handsome, happy, idea, intelligence, intelligent, kid, knowledge, learn, learning, light, lightbulb, male, medical, optical, people, person, preschool, pupil, school, schoolboy, schoolchild, schoolkid, smart, student, think, thinking, university, wisdom,