Two part question here:
1) What is your personal "favorite" Bible story?
2) What is your favorite story to teach kids?
I know that these may change over time based on what's going on in your life (I know mine have), and I know it's hard to pick just one, but let's give a shot just for fun.
Here are mine:
1) I love the story of Elijah and the Prophet of Baal on Mt. Carmel (1 Kings 18)
2) OK, I know I posed the question, and I should be able to answer, but I'm going to have to think about this one. :)