How many wheels do you use in a day? You can count wheels that roll---bicycle wheels, car wheels, and bus wheels, too. They help you get places. A push from you or an engine makes the axle turn. And...
THE BIG WHEEL OF VIENNA
Once, an Englishman wanted to build a big Ferris wheel as high as a twenty-storied building. He wanted it placed in a park called the Prater in Vienna, Austria. Safety engineers checked the plans...
