Ключевые слова: app, application, beautiful, boys, browsing, childhood, children, class, classmates, classroom, computer, concept, connection, education, elementary, gadget, girls, grade, group, happy, indoors, internet, junior, kids, knowledge, learning, many, online, pc, people, person, preteen, primary, pupils, school, schoolboys, schoolchildren, schoolgirls, schoolkids, showing, smiling, students, tablet, teacher, teaching, technology, woman, young,