Ключевые слова: background, backpack, bag, blackboard, board, book, caucasian, chalkboard, cheerful, child, childhood, class, classroom, clever, cognition, desk, education, elementary, emotion, enjoy, expression, female, girl, glad, grade, happy, joy, kid, knowledge, leisure, lesson, little, portrait, positive, pretty, primary, pupil, school, schoolbag, schoolgirl, show, smart, smile, student, study, success, table, thumbs up, uniform, young,