Ключевые слова: basic, block, blocks, childhood, concept, cube, decision, develop, educate, education, educational, elementary, example, figure, isolated, kindergarten, learn, letters, object, plastic, play, playschool, preschool, read, reading, sample, school, score, shape, sign, smart, square, stack, stacked, study, symbol, symbolic, tablet, teach, text, toy, trainer, training, white, word, write, writing, yellow,