Computer has been part of our life. We use it to work or to keep in touch with our friends. Computer provides people a way to recognize the world and share resources. For teenagers, they are so crazy about computer games. There always news reports teenagers playing computer games for a long time. Some people blame the company to create online games, while others criticize the school for not educating children well. Actually, parents have much responsibility to teach their children the danger of playing online game too much. What's more, not every child overuses computer, so it depends on their behavior.