Toonia Storymaker is an excellent iPad app for digital storytelling.  This super fun app uses cartoon animations (think Toontastic) to create engaging stories and spark students creativity.  A user can choose between characters, settings, objects, and more to tell their story (by adding text).  Once a story is completed it can then be shared to iBooks.  Also, the more a student plays the more features and objects they unlock.  This is a great easy to use drag-n-drop app that is perfect for integrating technology into any grade (KDG on up) or curriculum.
I highly recommend checking out Toonia Storymaker by clicking here!!!
For my Pinterest board on Digital Storytelling click here.
For my Edshelf collection on Digital Storytelling click here.
Below is a brief demo...