What's the first rule in self-defense? Don't be there! It's that simple. If you are not in a dangerous situation, nothing will happen to you there. This is an easy rule to teach your kids. Ask your kids some questions.
Question: You know that dark alley two blocks away? What do you do to stay safe?
Answer: Don't go down it.
Question: What should you do if your friends put themselves in a dangerous situation (doing drugs or alcohol, fighting, etc.)?
Answer: Walk away. Get out of the situation immediately.
Question: Is a police officer or firefighter a stranger?
Answer: Yes! The definition of a stranger is someone you don't know, but most kids assume that this rule doesn't apply to the police and firefighters.
These questions and answers will help both you and your kids understand each other better, and you will both learn something about the first rule of self defense for kids. For the last question ask your kids for examples of dangerous situations they should walk away from.