Ключевые слова: background, block, building, business, children, concept, construction, dark, design, development, growth, illustration, occupation, payment, performance, planning, play, playful, profit, progress, purple, pyramid, recovery, red, reversing, safe, save, savings, sensory, shadow, sign, simple, skill, stability, stacked, stacking, strategy, structure, success, surface, symbol, tabletop, tactile, texture, toy, white, wood, wooden, yellow,