Octopus (ride)

The Octopus is a type of amusement ride in the shape of an octopus. Five to eight arms attached to a central axis spin and move up and down in random, while cars at the end of the arms, either attached directly to the arm or fixed on spinning crosses, spin freely or stay in place, depending on the exactly type of ride. Each Octopus ride has the arms attached the middle of the ride. The middle of the ride will move somehow (Octopus head, Spider cylinder object, and so on). Most octopus rides require guests to be at least 42 inches to ride without an adult; smaller children must have an adult with them.

There are many different kinds of Octopus. They include:

...
Wikipedia