I know that when I firsted learned BASIC, I was interested in the
choose your own adventure books(This was 4th grade back in '90)
So my classmates and I would program little choose your own adventure
text games. In general you either died at the end, or turned into a
girl(died, this was 4th grade). Writing the programs was fun, and
we'd plop it on a disk, and trade with each other.

So now that I'm done with memory lane, what you might want to do is
pick something that interests her... Music = make a music catalog,
something that you can expand upon and increase the challenge throughout
the entire learning process.

I was going to say more, but while writing this, my boss came and spent
20 minutes telling me nothing at all

-xPhase