Ключевые слова: abc, alphabet, alphabetical, b, background, blackboard, board, c, chalkboard, child, childhood, children, christmas, class, classroom, communication, concept, early learning, education, elementary, freedom, geometrical shape, green, infante, kids, kindergarten, knowledge, learn, learning, lesson, letter, letters, letters of the alphabet, message, preschool, primary, ridge, school board, simple, spelling, start, study, teach, teaching, white, wooden, write,