When my kids were little, sometimes I would tell them a very short bedtime story. I would build it up first -- this is the greatest story, I would say. When their expectations were at maximum, I would tell the story: "Once upon a time, they lived happily ever after!" Here are some more:
Contents of this section:
Mom's Dying Words, by Hollis Gillespie (retold from memory by Graeme, so you can credit Hollis for the good story, and blame Graeme for the bad telling of it)
The "Dark and Stormy Night" department -- the first sentence of a bad novel contest
Short Poems - poems that end abruptly
Updated "Ant and Grasshoper" fable, which is more of a rant than a short story.