Ключевые слова: arrow, chalkboard, cheerful, childhood, classmates, classroom, cog, communication, computer graphic, cute, digital, digitally generated, direction, doodle, drawing, education, gesture, hand drawn, hands, happy, idea, indicating, industry, innovate, innovation, learning, light bulb, machine, mechanic, pointing, positive, pupil, school, smiling, thumbs up, together, uniform, wheel,