Ключевые слова: active, activity, alone, autumn, bicycle, bicycling, bike, biking, child, childhood, city, cycle, driveway, exercise, female, forest, fun, girl, happy, healthy, helmet, hobby, kid, learn, learning, leisure, lifestyle, little, nature, outdoor, outside, park, pathway, protection, protective, recreation, ride, road, safe, safety, sport, summer, sustainability, teenager, town, trail, training, urban, walking,