
Animation as we know it today started in the early 1900's with many primitive devices to make drawings move, such as the zoetrope, the magic lantern which was the predecessor to today's projector and the humble flip book. These methods which seem simple and crude compared to todays standards, were, in their time cutting edge, and no doubt caused quite a stir.
Animation moved ahead quickly through the 2oth century, using more advanced hand drawn animation, and then stop motion animation, where the objects are moved a little, photographed then moved a little more. Then came the dawn of the computer and CGI animation, the first example of this was Toy Story by Pixar, which opened up a whole new world of animation.

While primitive forms of animation from the 19th century can entertain a modern audience for approximately 3 seconds, they are in no way comparable to modern forms of animation, except for the fact that with both you see moving images on some form of screen. However, the early devices used to make the images move were enough to inspire people into developing better techniques, even as early as 1937, with the release of Snow White and The Seven Dwarfs, which is still a watchable film today.

However, in the case of a program such as South Park, which started off as a cut out animation made by using cut out cardboard figures, moving them slightly then photographing them. Once this series became a hit and the makers had some money they then started using CGI animation to make the cartoon, and this in my opinion ruined the show as it lost some of its ooomph.