text: The same technology can make computer-animated faces more expressive for video games or video surgery. To faces more expressive the can tell how the person feel sad, angey and happy. Also the video the people can play with friend in school or in online. When student are bored they can play video game and make their happy. The hospital use technology for video surgy. Most human communication is nonverbal, including emotional communication. so computer need to understand that, too.