Ключевые слова: background, black, bulldozer, bulldozing, childhood, children, closeup, concept, construction, construction equipment, crawler, digger, dozer, earthmover, engineering, equipment, excavation, excavator, front loader, heavy equipment, industrial, industry, machine, machinery, mini, miniature, model, object, plastic, plastic toy, play, playtime, push, sandbox, scale, selective focus, small, surface, tiny, toy, toy truck, toy vehicle, track, tractor, truck, vehicle, wheels, yellow, yellow bulldozer,