Building, blasting and crushing. It's all in a day's work for front-end loaders, diggers and dozers. Mighty machines. At the construction site: Big Cat the shovel is your guide for a tour of a hospital construction site. It takes a lot of different machines to build a hospital, and you'll meet the bulldozers, dump trucks and mixers that make it all happen. Then visit a skyscraper construction site and watch as Carmen the Crane lifts heavy machinery...