Goodmorgen Armin,
If you want to buy your sister a nice “thank-you” present for taking a picture of you, I recommend the following scarf:
http://www.pierrotetcoco.com/Ibride-Silk-Scarf-Reverence-p/a-s-1.htm
It has a picture of a group of sparrows flying in the air and is very beautifull.
She ofcourse might also like it for her birthday 😉