Rebecca's got two fully formed sentences that she uses regularly now.
Sentence #1 is from Dora: "There he is!" or, alternately "There it is!"
Sentence #2 is much more interesting: "Clean my fingers!" or, as we've heard once "Clean my fingers please!"
The reason #2 is so cool is that it's something we've never said to Rebecca. I've never asked her to clean my fingers, obviously. So that means she knows the meaning of all three words, and has put them together correctly.
I'm anticipating taking dictation of the first chapter of her first novel soon. (She still doesn't know how to type yet.)