Abstract
Children like cartoon games, a cartoon game for children should support more knowledge. Leaning nonverbal emotion interaction is a very important social skill for a child, how to animate nonverbal emotion interaction in a cartoon game is an interesting subject. Emotion cognitive structure of a virtual character is presented, emotion expression method is also proposed, a virtual character can express nonverbal emotion by body pose or facial expression, a demo system of nonverbal emotion interaction among three virtual characters is realized on a PC, the result shows that the method can provide emotional virtual characters for a cartoon game.