I was doing my daily blogroll reading this morning, and I found the best idea over at Greetings From Nowhere, my favorite author's (the talented Barbara O'Connor) blog! Even her blog is well-written, and she most definitely has a sense of humor!
But back to the topic - won't these be great for having kids highlight a section of their text, and then use tools from their "revision toolbox" (thanks, Georgia Heard!!) to improve their own writing?!!! Love it! :)