Ключевые слова: active, adventure, america, attraction, bulldozer, business, capitalism, children, commerce, construction, digger, diggerland, earthmoving equipment, editorial, enterprise, equipment, excavating, family, fun, human, human being, human beings, humans, industry, kids, machine, machinery, mercantilism, new jersey, north america, people, person, theme park, trade, united states, united states of america, us, usa, west berlin,