Scribble Press is a free iPad app that I just found out about for digital storytelling. This is a great app because it allows a student to create a story by selecting a theme and then filling in a few blank words (think mad libs). Then the child can create a picture to go along w/ the story and share it w/ others.
I highly recommend checking out Scribble Press by clicking here!!
For a more detailed review check out Teachers w/ Apps.