Children are addicted to social network, so they use tablets too much. A report by Gentile (2002), “A researching study conducted by the National Institute on Media and Family, children spend more time sitting in front of electronic screens (four hours) than doing any other activity besides sleeping”. Currently, there are social network services to choose a lot, for example Facebook Twitter makes people can contact each other all the time, but for children it can cause bad outcomes follows. They are not interested in talking with friends around as a result,but talking with friends in social network. children adapt someone else is difficult. Another cause bad is that children follow news updated in social network all the time,