B.G.
Maybe try to get a bunch of photos from several different people and make a little book for her. You know how they have "grandma brag books" ? See if they have one of those little photo albums you can put a bunch of photos in of her over the couple years she was here. That and stuff from where you guys live. I think it is awesome!
Edit- Kalualani has a cool idea. Shutterfly.com has awesome stuff you can put photos on!