Ключевые слова: book, bubble, calendar, cap, certificate, class, classroom, coffee, commercial, communication, computer, design, diplom, education, elements, equipment, expression, gear, icon, illustration, information, interacting, knowledge, laptop, learning, lesson, mug, notebook, objects, pencils, pens, picture, play, preschooler, primary, school, set, study, symbols, training, video, website, youth,