Ключевые слова: age, boys, building, casual, caucasian, cheerful, chemistry, child, childhood, children, classroom, clothing, cute, desk, development, education, elementary, enjoyment, friendship, fun, girls, glasses, group, happiness, holding, indoors, intelligence, joy, learning, lifestyles, long, medium, multiethnic, people, project, research, row, school, schoolboy, schoolgirl, science, sitting, smiling, student, studying, table, uniform,