Prevent children from internet disadvantage

Today, the internet has a miracle world for our life. It has information, entertainment, social, etc. But for the children- who need a serious education about how to use internet- internet's just like double-edged knife. Internet, with its wide and free control for user, may contains many unsuitable for children. For example, it may has many adult, violence information, picture, game, etc. In present day, with facebook, twitter, myspace, that huge problem more easily hurt children' imagination, thinking, act...With the good and hard education from family and school, we can make a better life for children.