the ride, although it is possible to find bigger models designed for older children. Track rides are not necessarily restricted to trains; animal track rides that feature horses or frogs have also been documented. In a similar fashion, another type of ride that would classify as a track ride would be one with an elongated base where the figure paces the length of the base, then turns and moves in the opposite direction on reaching its limit. Carousel rides Another common type of kiddie ride is the miniature carousel type. These rides are usually in the form of a small-sized carousel and newer models have the coin-box on the main pillar whereas older units have the coin box on a pole sticking out of the side of the ride. Carousel rides featuring licensed characters (see below) are not common, but do exist. A Thomas the Tank Engine carousel ride is known to exist, as is one from a British television show for children called Play School. Carousel rides featuring the characters from The Wiggles, Bob the Builder, Sesame Street and Hi-5 have also been documented. Hydraulic rides More commonly built by European kiddie ride manufacturers like Automatic Toys Modena (ATM) from Italy, hydraulic rides are kiddie rides situated on a hydraulic arm that raise and lower the ride during their activation. Usually, the rider is given limited interaction with the ride in the form of up/down buttons or levers so that the rider can instruct the ride to fly higher or lower, giving the user the impression of some control over their experience. Base rides This kind of ride is perhaps the most common type, an animal or vehicle situated on a vacuum-formed base that moves up-and-down or side-to-side, or even both, when activated; some even move in a slithering-like motion. Usually, rides of this configuration have the motor hidden in the base, although some larger rides have the motor hidden in the ride-on figure instead. One of the most popular rides is a horse ride. Recent developments have included the "Pony Express" ride, first manufactured by Italian company Cogan. These feature a complicated mechanism that alternates between galloping and trotting motions during the ride, mimicking the movements of a real-life horse. This type of ride has become very popular, that this base has been adapted by both the Spanish manufacturer Falgas for their own version of the "Pony Express"