Ключевые слова: active, activity, behind, bicycle, bicycling, bike, biking, black, boy, caucasian, child, childhood, children, cycle, diversity, field, friends, friendship, girl, green, group, hands, happiness, happy, healthy, helmet, hold, kid, kids, leisure, lifestyle, male, outside, park, playing, race, recreation, ride, riding, smiling, sport, summer, team, together, young,