Tilt-A-Whirl is a flat ride designed for commercial use at amusement parks, fairs, and carnivals. The ride consists of a number of cars which rotate freely while moving in a circle. As the cars revolve, the floor of the ride undulates so that the cars rise and fall as the ride spins. The offset weight of the riders causes each car to rotate. The riders experience varying levels of g-force from the spinning of the car, and the rotation of the ride itself. It is similar to a Waltzer, which is used in Europe. The rides are manufactured by Larson International of Plainview, Texas.