Ключевые слова: back to school, boy, caucasian, cheerful, child, childhood, chinese, class, classmates, classroom, cute, development, early learning, education, elementary, elementary school, female, fun, girl, gym, happy, hula hoop, indoors, learn, learning, male, mixedrace, physical education, playing, pupil, school, schoolchild, smiling, sports hall, sportswear, toy, uniform,