Ключевые слова: background, black, blackboard, board, bright, brilliant, bulb, business, chalk, chalkboard, classroom, creative, creativity, discovery, drawing, drawn, education, electricity, energy, genius, glow, glowing, idea, illuminate, imagination, ingenious, innovation, inspiration, intelligence, invention, learn, light, lightbulb, original, power, school, science, sign, simplicity, sketch, smart, solution, sparse, success, symbol, think, twinkle, white, wisdom,