The Star Money - a little tale

There is a story, by Brother Grimm. A girl that is poor but she has enough. She comes across another girl begging, who has nothing at all. The girl gives her everything she has, they swap, something for nothing down to her very last clothes. But then the sky erupts and stars fall to the earth like money and she finds herself wearing clothes and dancing with the other girl.

What would you swap? 

c.k