Ключевые слова: abc, activity, advertising, background, blackboard, blank, block, board, chalk, chalkboard, childhood, communication, copy, desk, dirty, drawing, education, empty, enjoy, entertain, entertainment, frame, fun, green, happy, have, joy, knowledge, language, learn, lesson, letters, life, lifestyle, message, note, office, old, play, pleasure, school, space, study, table, teach, text, toy, wooden, word, write,