I have no input on quilting and Sweden, but you might want to locate a knitting store for her. I'm sure she'd be thrilled to go home with some good yarn she couldn't get (at least not cheaply or easily) at home. :)
When I was in junior high we hosted a girl from Okinawa, Japan. There was a pretty steep language barrier (and she was a little afraid of the farm animals), but she was so sweet and we had a very good experience. Have fun with your guest!