From the Airport to the Harbour, at the Race Track and the Demolition Site big machines are hard at work. Mighty Machines takes the audience along as bulldozers, tractors, big trucks, boats and cranes go about their daily work building skyscrapers and roads, collecting the garbage and washing the streets. As they work, the machines talk to each other and to the audience in a friendly, enthusiastic style, letting us know not just what they do, but how much they love doing it.