Ключевые слова: atom, bottle, calculator, certificate, class, classroom, clip, clock, commercial, communication, computer, design, diplom, education, elements, equipment, expression, fill, icon, illustration, information, interacting, knowledge, learning, lesson, line, lupe, marker, mug, notebook, objects, paper, pencils, preschooler, primary, school, set, study, style, symbols, training, youth,