Ключевые слова: american, asian, back, backpack, bag, boy, break, caucasian, child, childhood, children, classmates, copy, day, education, elementary, ethnic, ethnicity, first, friends, friendship, full, fun, girl, girls, grade, group, hand, happy, home, horizontal, kid, kids, late, length, outdoor, people, primary, pupil, pupils, recess, running, school, space, students, time, together, view, white, youth,