For the most part this arrangement works well for us, but as our children grow older we find ourselves confronted with discussions about moral values and other issues, and feel somewhat at sea. We read the Bible and some other religious or spiritual books with our children occasionally and of course talk about things as they come up as best we can, but sometimes I wonder if that's enough. If so, then teach what you believe when you have the opportunity. This can be as simple as posting a notice for something valuable you've found or returning extra change the clerk miscounted.
Children learn by observing and by understanding the rationale in a situation.
They also learn more when it applies to a situation they are in, which is probably not every Sunday at 10 a.m. There is a widespread assumption in this country that religion has a monopoly on morality. There are a great many people who are as ethical as the churchgoer. My family is atheist, and we are law-abiding citizens who vote and pay our taxes, and would not think to steal, lie or cheat. I have demonstrated through my children that you do not need religion to bring up fine, ethical people.