Hi Lynn,
How exciting to be spending your daughters birthday at Disney World!
The promotion that offered free Park admission on your birthday is no longer valid. This years theme is,
"Let the Memories Begin".
To obtain a complimentary birthday button for your little girl, simply stop by any Guest Relations counter. These are located at the entrance to each of the Parks.
As far as dining at
Cinderella's Royal Table, I honestly think your daughter is the perfect age for it!! I've brought my family 3 different times and the older they get, the more Magical it seems to be. She'll remember the experience forever, where if you went when she was a bit younger she might not have.
Have you considered taking your little Princess to
Bibbidi Bobbidi Boutique before dining in Cinderella Castle? My little girls absolutely love this enchanting experience!
Have a wonderful vacation,
Kaylene