Give her the macro lens, and she'll probably ask for a tripod to go with it.
suitcase with spinners.
When she gets the suitcase, she will promptly go on a Caribbean cruise.
When she goes on the cruise, she'll immediately notice all the wonderful foods to eat. She'll get carried away by taking a zillion photographs and tasting all the foods.
When she gets home, she'll want to upload all the photos and put them on her blog.
When she opens her blog, chances are she'll see a recipe for a cookie.