My kids have all created wonderful examples of web 2.0 presentations using this software, as early as the 2nd grade. If you haven't tried it, you should.
A free online e-book for learning about and how to use a variety of Web 2.0 tools including Diigo, blogging, wikis, Evernote, Flickr, Glogster, Jing, Prezi, Ning, SlideShare, Twitter, and VoiceThread,
This is Tania's blog from EDUC 584, Waterbury. Tania has been trying out a variety of digital tools, including ones for making digital stories. She has also tried out these tools with her younger students. Suggest adding her blog to Google Reader for updates.