StoryKit is an application for iOS devices created by the International Children's Digital Library. It is a free app that can be used to create an electronic storybook. It allows for text, images, and sound to be used to tell a story.
It is very easy to share stories created on StoryKit and, in fact, it was designed with that feature in mind. Researchers at the University of Maryland's Human-Computer Interaction Lab created it as a way to for study how mobile devices can encourage children to work with members of their families doing creative and educational activities. The idea is that by creating stories on an iPhone (as opposed to paper and pens) it is easier to find time to work on these activities anytime and anywhere. When you're done, you can carry it with you in your pocket, show it to friends and family you meet in your daily life, or send it electronically to people who live further away.