Internet, is useful but harmful to children too. Internet has an useful for communication and acquiring knowledge for education. But the internet is to harmful, if use in the wrong way. There are many impact of the internet on children. For example, physical, mental and social aspects. Children who play social network such as facebook, twitter, youtube may be gain bad media. Children may imitate from idol on social network might be a bad example, for example the children see someone on facebook posted that precarious picture children will do the same because they think if follow them. They will being famous people. The Research found that children like to play games on the internet are aggressive personalities. In conclusion, internet has both advantages and disadvantages children should be used appropriately.