Go beyond the story of the three little pigs with this open ended writing extension. Have your children discuss and explore the option of someone else attempting to blow down the houses of the three pigs. Let the children create new stories and ending and even recreate their version in dramatic play or just outside on the playground.
I've had children simply draw their ideas and dictate their story to me and I've had children write it on their own. This is a very open ended prompt that can be used in small group, whole group or even as a writing prompt in a station/center by itself.