Ключевые слова: 4k, afternoon, age, back to school, building, children, class, concept, coronavirus, covid19, disease, education, elementary, face mask, females, girls, happy, infection, kids, learning, lockdown, looking at camera, new normal, normal, open, outbreak, outdoors, pandemic, people, playground, portrait, prevention, primary, protection, protective, pupil, quarantine, reopen, safety, school, school child, small, standing, student, virus, waistup, wearing, yard,