Ключевые слова: basic, block, blocks, childhood, concept, construction, create, cube, develop, educate, education, educational, elementary, example, figure, game, geometry, isolated, kindergarten, learn, math, object, play, playschool, preschool, sample, school, score, shape, sign, smart, square, stack, stacked, study, symbol, symbolic, teach, toy, trainer, training, white, wooden,