Ключевые слова: back to school, background, banner, boy, cheerful, child, children, children classroom, class, classmate, classroom, day, education, elementary, excited, first, friend, friendship, fun, funny, girl, grade, group, happy, happy school, hug, junior, kid, learning, lifestyle, little, people, portrait, primary, pupil, school, schoolboy, schoolchildren, schoolgirl, schoolkid, september, small, smile, standing, student, study, together, young,