I would first suggest a doll cake decorated to look like Cinderella. She would have blue and white frosting for her dress. I'd love to see a glass slipper cake, but that would be a difficult cake to shape, so I'd put clear slippers near the doll's feet. Small plastic birds could carry ribbons down her dress. It would also be cute to make the cake in the form of either a carriage or castle. In regards to a castle, I used the search engine here and there are 7 threads with reference to Cinderella. Be sure to read the related messages. One of the messages has instructions and pictures for the castle cake. Good luck with her party; this theme sounds cute. Any other thoughts out there?