Ключевые слова: activity, artificial, background, beginning, cipher, colored background, concept, construction industry, copy space, cover, covering, crumb rubber, cushion, design, flooring, go, grainy, granular, ground, grunge, junction, mat, material, modern, outdoor, outdoors, play area, playground, protection, recycled material, red, rubber, rubber coating, rubber crumb, rubber granulate, run, safety, soft, softness, source, sport, sports field, start, starting, starting point, structure, surface, zero,