Control strong emotional responses when you disagree with the child's point of view. I am a teacher in a child-care facility. My kids have been pretending to shoot guns lately and have not responded well to redirection. Your attention to this problem is to be applauded, because children need to be taught as early as possible about alternatives to violence. Young children may also have a hard time sitting through and participating in long conversations.
Puppets can capture their attention and imaginations quickly and easily.
Puppets can be especially useful for teaching conflict resolution skills because puppets can help children shift from seeing only their own point of view. Watching how puppets act out their roles in a fantasy situation can also help young children to see how two different views may interact with another. Start with basic, small puppets that are less likely to suggest fighting or aggression. Often the first thing a child does with a puppet that covers the hand is to punch someone else. Make simple stick puppets by cutting small figures out of cardboard.