I read it to my class as an introduction to a science unit on change, but there's loads you can do with it. It's great for prediction. There are vocabulary words like ember and bud. You could tie it in with life cycles, producers and consumers, recycling, art...It's a gem of a book! Has anyone else used it?
My one complaint is that the answer for each letter is on the same page. So if you're trying to get students to infer the answer, you have to be careful how you hold the book.
After the story I had my little ones give it a try. They came up with some pretty clever ideas.