Treat them the way you want them to treat others - It's easy to be nice when the kids are nice. The kids need to see how people (you) can be patient and kind when life isn't going smoothly. They need to see how to work with someone whose view is different. They will get to see that by how you treat them when their view is different from yours. If you treat their needs and feelings as less important, they'll learn to treat other's needs and feelings as less important. And then when you're old and bedridden, they'll say, "No, you don't need more tea, no, you don't need to finish that TV program. I have other things to do than tending to your needs. Can't you see how busy I am?"
photo by Erika Andromeda, of a patient child and his well-loved Great Grannny