It has been proved that mental development in childhood can be significantly influenced by the learning processes of children, which consist of both nurtural academic learning and natural imitation. Children may imitate any actions, no matter good or bad, via the surrounding environments such as programs showed on TV sets, dialogue of their parents, video games they played and phenomenon of their schools. If there are some terrible things happening, for example violence, children may be eager to have a try then use violence on the other children or animals. That could be the original reason of the frequent school bullying in recent years.