Good advice that I could go online or to Chicago. The advice I'm looking for would apply for that mode of purchase as well. I would like advice from Poles on what might be a good gift - something that she probably wouldn't think of buying for herself or find/see all the time in daily life in the US (outside of a Polish neighborhood in Chicago). Something that maybe she used to have or see all the time when she was growing up in Poland, that is not common here.
Thanks for the suggestions so far.
Polart and a store called Poland by Mail in the US has great stuff, including the slippers the other poster talked about, but the cost per item and the shipping will really get you!
If you live outside what I call the major Polish cities in the US and can't get to a Polish store, try them out. A friend ordered dried Polish mushrooms and some ethnic dolls from Polart and was very pleased.
And if you have a lot to spend, I second the idea that amber is a good idea; Baltic amber is beautiful and highly prized.