Ключевые слова: background, building, bulldozer, business, car, child, childhood, color, concept, construction, crawler, design, dig, digger, dump, equipment, excavation, excavator, fun, heavy, hydraulic, industrial, industry, infrastructure, loader, machine, machinery, model, object, plastic, play, power, scoop, shadow, shovel, site, small, toy, tractor, transport, transportation, truck, vehicle, wheel, work, yellow,