Citroen 2CV ? very cheap to run, easy to maintain, Gp1 insurance, handle well and she will learn to *drive* and read road and traffic properly driving one! They have loads of grip, great brakes and are great fun all round.
Get a good one for around a grand, and providing it doesn't get bent (suprisingly difficult to crash IME!) you'll sell it for the same or more when/if you get rid.
They've got that "girly" charm too :-)
Mike P