As soon as they're born, you should tell them "You should be grateful you are beginning a new phase of life and say Thank You Lord!" Then upon the receipt of any gift to anyone around them, they should hear the gratitude and acknowledgment. When they grow up and give you something no matter what they should hear the words, I appreciate your efforts or thank you for doing that for me. What ever you pass onto them, they will pass on to others. Another thing that needs to be passed on are apologies. I don't understand why some parents don't feel the need to apologize to their children, like "I'm sorry, I gave you the wrong information". It shows you are accepting responsibility for your actions. They may have had to pay the consequences for your actions.