Ключевые слова: accident, ache, active, activity, asphalt, backpack, bag, bicycle, bike, biking, boy, caution, child, childhood, concept, cycle, cycling, danger, fall, happy, helmet, help, hurt, injury, kid, lifestyle, outdoor, outdoors, pain, people, person, problem, protection, pupil, riding, road, rucksack, safety, school, schoolboy, schoolchild, security, street, student, summer, town, transport, transportation, unsafe, urban,