Ключевые слова: 20s, back to school, black, boy, career, caucasian, cheerful, child, childhood, class, classmates, classroom, cute, development, early learning, education, elementary, elementary school, exercise, female, girl, gym, happy, healthy, indoors, job, learn, learning, male, mixedrace, occupation, physical education, profession, pupil, school, schoolchild, smiling, sports hall, sportswear, stretching, teacher, teaching, uniform, woman, young adult,