Ключевые слова: 45 years, 67 years, 89 years, active, african ethnicity, athletic, basketball, basketball court, basketball hoop, black, boy, boys, caucasian, caucasian ethnicity, child, childhood, chinese, chinese ethnicity, classmate, competition, development, diverse, diversity, education, ethnically diverse, ethnicity, female, five people, friend, game, girl, girls, group, indoors, innocence, learning, male, mixedrace, mixedrace person, multiethnic, play, playground, playtime, recreation, school, school kid, schoolboy, schoolgirl, sports, standing, student, together, uniform,