Teaching my son to shake hands properly
Been working with my 8 year old on a proper handshake. Firm grip, eye contact, say your name clearly. He rolled his eyes at first but I caught him practicing with his buddies at school. That's the kind of thing that sticks with you. A man's handshake says everything about his character. My old man taught me this same way and I'm proud to pass it down.
Simple but important stuff. My 6 year old is starting to notice when adults do this and it matters to him. Good on you for teaching the fundamentals early.