If you are interested in writing nonfiction for kids, the Highlights Foundation has a couple of terrific workshops coming up: Nature Writing Boot Camp (April 16-19) and Science Writing Boot Camp (April 19-22).
Both workshops offer a terrific opportunity to work with award-winning authors and editors, learn how to write science as a an engaging story, and get feedback on your work.
Not sure you can afford it? The Highlights Foundation offers scholarships. (They're worth it people--I speak from experience!)
And if non-fiction isn't your thing, check out the other workshops offered by the Highlights Foundation. There's something there for everyone.