Ключевые слова: 20s, 2529 years, 45 years, 67 years, 89 years, academic, alertness, attentive, back to school, black and white, book, boy, boys, casual clothing, caucasian, caucasian ethnicity, cheerful, child, childhood, class, classmate, classroom, communication, cute, development, digital tablet, education, elementary, elementary school, enjoyment, excitement, female, focused, friend, friendship, fun, girl, girls, hand raised, happy, holding, innocence, intelligent, joy, knowledge, learning, leisure, lifestyle, male, medium group of people, mixedrace, mixedrace person, notebook, pencil, primary, school, schoolboy, schoolgirl, schoolkid, sitting, smiling, student, study, studying, table, wireless technology, woman, young adult, young women,