Do not ever let children under 5 yrs old watch tom and jerry. It is violent in a way.Children may think that hitting someone is cool and that person would not be harmed , for example, tom punched jerry and nothing happened to him, so if i punch someone that person won't be hurt?
Animation is just another medium for entertainment. Although it is widely regarded as a children's form of entertainment, animation has also been used as an effective form of adult entertainment. The beauty of animation is that it expands the human concept of suspension of disbelief. Really, anything can happen in cartoons and the audience will buy it because it is a cartoon. For this reason, animation is a good choice for making difficult or outlandish points in story telling.