Ключевые слова: back, backpack, backpacker, backpacks, beautiful, casual, caucasian, caucasian ethnicity, cheerful, city, class, classroom, community, education, education building, elementary school, female, friends, friendship, girl, group, guy, happy, lesson, lifestyle, outdoor, outside, people, person, preschool, school, school building, school children, schoolgirl, schoolyard, sidewalk, smiling, street, student, studying, teen, teenage, teenager, together, travel, university, urban, walking, woman, young,