Hmmmmmm my almost 6 year old nephew likes hot wheels, the Spiderman movies, Ninja turtles, the Incredibles, Hulk, Simpsons, things like that.

6 year old girls, ummmmmmm, is she into girlie things, like Bratz? You could get her some kind of Bratz thing, hair thingies, Barbie stuff??, clothes.

I'm trying to think of things that we have bought them in the past, I think those are it, our niece throughout the years has always loved the clothes we have bought her.

HTH