Hi Phaedra!
Disney Cruise Line does offer
Celebration Packages that include festive stateroom decorations and a customized cake. This package is an additional charge, and your cake must be ordered seven days prior to sailing. The
Gift and Amenities section of the website has all the details you need as well as the order form. If you haven't already please contact Disney Cruise Line at (800) 951-3532 to note your daughter's birthday on your reservation. On your princesses' birthday, several dining servers will sing "Happy Birthday" during dinner. If you decide not to order a cake, a special birthday dessert will be delivered instead. Character greetings will be available throughout your cruise put specific requests are not on option. Your Personal Navigator, the daily cruise newsletter, will have all the character meet and greet times and locations listed for each day of your cruise. If you want a special keepsake, you can bring along a photo mat, pillowcase, or Vinylmation to have signed by the characters. You could write "Happy 2nd Birthday! Disney Fantasy 2012" and the characters can sign all around. Just drop off your item with sharpies or fabric markers in a plastic bag labeled with your last name and stateroom number to Guest Services when you board. The items will be placed in your stateroom by the last night of your vacation.
Also, don't forget to pick up a Birthday Pin from Guest Services on her birthday! I hope these suggestions help your princess have a magical 2nd birthday onboard the Disney Fantasy!
Nancy