As a part of the fun I’m having contributing to Wikijunior (part of Wikibooks, offering free, open content textbooks), I’ve taken an animal alphabet book there and made video and ebook versions of it.
They’re available for viewing and download here.
There are versions for the desktop, various handhelds, iPods, and even a Mobipocket ebook version. (One of the not-fun things about creating video is all the format issues. I think we’ve put about everything up here, but let me know if anything’s been missed.)
If you haven’t ventured into the world of contributing to wikis, Wikijunior is a great place to start. (Try the Human Body book or Ancient Civilizations.) The more people who contribute to these free “copyleft” resources, the better they will be. If you’re not sure how to start, try something small like fixing an error or just adding a couple sentences. It’s a lot of fun!