Magic windmill is one kind of the large-scale entertainment machines which are given up-to-date idea and high technology. A total of six support arms are fixed on the largest arm, each of the support arms has a cabin where there are five seats. Passengers are pressed on the seats by reliable fixation pole safely. Thirty seats are available at a time. While the equipment is working, the main column will be raised up slowly, and then it circles both in positive and negative revolution. Meanwhile the support arms also circles at a very high speed. Under this condition the centre of gravity changes and the cabin begins tumbling freely and irregularly. Various motions are added, which produces a three-dimensional and varied trajectory. Scream, big laughter, acousto-optic effect and luxurious decoration and exciting music make people feel like being taken to a fierce ocean, experiencing the excitement of upside down.