Great song. Title says it all, but it's good listening.
Keep it simple. Explain to your own children why we have the police. Good guys and bad guys.
Start when they're little.
The same theme should be prevalent throughout their education.K-12
Make sure they understand how LE works, and how the courts work. Teach them about the Constitution. All the education in the world is of little use if they can't function in society.