Ключевые слова: boy, caucasian, chemistry experiment, child, childhood, class, classroom, college, concentrating, concentration, desk, digital, discovery, education, examining, female, girl, group, happy, indoors, inside, kid, lab, laboratory, learning, listening, little, looking, microscope, modern, people, person, pupil, school, schoolgirl, science, sitting, smiling, student, study, studying, table, teenage, together, tutorial, uniform, young,