Ключевые слова: african, american, back, backpack, bag, boy, break, caucasian, childhood, children, class, classmate, cute, education, elementary, end, energetic, ethnic, ethnicity, friends, friendship, fun, girl, grade, group, happy, hispanic, horizontal, kids, late, learn, length, multi, person, primary, pupil, racing, running, school, schoolboy, schoolchild, schoolgirl, student, together, youth,