Standing up for whats right even when its hard
Had a situation at work where some of the guys were talking badly about one of the newer employees behind his back. I shut it down and told them that's not how we handle business here. Couple of them got defensive but I didn't care. You either have integrity or you don't. Can't claim to be a man of principle and then look the other way. My kids are watching how I operate in the world and I want them to know their dad doesn't compromise on character.
Standing up for the new guy when it would be easier to just go along is exactly the kind of man you want your kids to become. That's teaching by doing.