Giant ferris wheels have long been popular attractions at fairs, amusement parks and theme parks, and have taken on many different forms. Available in many sizes from children's size to giants, the rides have also featured varied styles of gondolas to reflect a theme or offer a unique ride experience. The giant ferris wheel is a large wheeled mechanical building with a passenger cabin (Gondola) hanging on the rim of the wheel. The passenger sits on the ferris wheel slowly up and down, overlooking the surrounding landscape. The common ferris wheel is suitable for the amusement park (or theme park) and the garden party, as a kind of amusement park game, together with the roller coaster, the carousel, they are called "paradise three treasures". But the ferris wheel also often installed on other occasions alone, usually used as the observation deck of the activity.