And now Deep Thoughts.... by Jack Handy...
One thing kids like is to be tricked. For instance, I was taking my little nephew to Disney Land, but instead, I decided to drive him to an old, burnt-down shack. "Oh no!!!!" I said,"Disney Land has burnt down!" He cried and cried, but I think deep down, he thought it was a pretty good joke.
If a kid asks where rain comes from, a cute thing to tell him is, "God is crying". And if he asks why God is crying, another cute thing to say is, "Probably something you did."