Building an airplane: A jet airplane is one of the fastest machines on the planet. But have you ever seen one being made? It all goes together like a jigsaw puzzle! Once it's assembled, a test pilot takes the jet out for a flight. Will it pass the test? Soon the jet is ready to get to work flying people all over the world; Ride the mountain rails!: Work train is busy keeping the tracks in good shape. It takes the power of three engines to get up the sharp inclines and over the pass. These machines are a special hardy breed, made for the mountain rails; Reach for the sky!: Strech is a crane and his job is to lift things onto the top of very high buildings. He's attracted to a truck so he can drive to jobs, but he's so tall that he has to be taken apart in order to fit through the streets. It takes a friend, Yellow Crane, to help Strech assemble again!