Ключевые слова: background, blackboard, board, boy, casual, casual clothing, caucasian, chalk, chalkboard, cheerful, child, childhood, children, children only, class, classroom, concept, cute, day, education, elementary, face, fun, growth, happy, imagination, indoors, kid, knowledge, learn, learning, lesson, lifestyle, little, net, one, one person, people, person, portrait, school, schoolboy, schoolchild, student, study, studying, sweater, write, writing, young,