That's awesome! One thing I've started to do with my older son, who'll be 4 in a month, is helping him journal about his day. About half an hour before he goes up to bed, we sit down at the table and he dictates a journal entry about his day. If he says something ungrammatical, like "I go'ed to the library," I'll say aloud, "I went to the library" as I write it down, so he picks up on it. I've noticed, over the past six months or so that we've been doing it, that he's gotten better at putting events in a sequence, and I think it's helping to spark his imagination, too, because sometimes he'll tell me fanciful things about his day that I know he didn't actually do.
That sounds really neat, I think I will start doing that with my daughter. I am away from home a lot so it might be something that we can do over the phone as our thing.