Ключевые слова: academic, adventure, background, board, boy, caucasian, cell, child, childhood, children, class, classmates, classroom, concentrated, concentrating, concentration, concept, cute, development, discovery, doing, education, environment, experiment, exploration, female, girl, kid, kids, learn, learning, lesson, lifestyle, looking, phone, playing, preschool, research, school, scientist, sitting, smartphone, technology, watch, window,