Ключевые слова: boy, child, childhood, class, classroom, colorful, concentration, concept, counting, depressed, education, elementary, eye, eyes, fun, funny, glasses, happy, having, home, homework, indoors, kid, knowledge, learning, lesson, letters, male, maths, painting, pens, person, pupil, sad, school, schoolboy, schoolkid, sitting, smiling, student, studying, table, task, teenager, textbook, thinking, thoughtful, unhappy, writing, young,