S.H.
is she girly-girly? What about a dress-up party? Everybody comes in costume. Activities could be nail jobs, hair styling, etc. If you do goody bags, wow....lots of possibilities!
Another idea: a cupcake party. Let the girls help make cupcakes. Make a huge batch....borrowing pans from friends/family. Let each girl decorate theirs.....& they each get to take home 6 - in a pretty little box that they get to decorate, too. & that's where the "wow" comes in....while they take turns baking/frosting ......the others are decorating their boxes & playing games. Games can include "Pin the cherry on the cupcake", "hot cakes" (like Hot Potato), "Cupcake Walk" (like a cake walk, only the ultimate prize is a giant cupcake to take home)....lots of variations for games!
With all of this, I would corral adult help!