Ключевые слова: 1, 2, 3, abstract, amusement, assemble, background, beginning, blue, calculations, childhood, colorful, colors, count, cutout, design, easy, education, eight, elementary, figure, five, foam, four, green, indoor, isolated, knowledge, learn, letter, maths, nine, number, object, pieces, play, puzzle, still, studio, symbol, text, three, toy, type, typeset, white, yellow,