Octopus (ride)
The Octopus is a type of amusement ride with a shape inspired by an octopus. Five to eight arms attached to a central axis of rotation move up and down in a wavelike motion via a counter rotating eccentric, 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 exact type of ride. Each Octopus ride has the arms attached the middle of the ride. Most octopus rides require guests to be at least 42 inches to ride without an adult; smaller children must have an adult with them.