Hi, Marissa!
I'm just loving this idea but I'm not certain if it would be something that you'd be able to pull off. Of course, I couldn't promise anything, but you could explain what you're thinking to a Cast Member privately when you are actually in the restaurant. It would certainly be very magical if the Princesses would be able to do this, but again, I'm just not certain that they can.
I do have an idea for you just in case the charms cannot come from the Princesses themselves. As you are probably aware, each of the Disney Princesses that are appearing at
Cinderella's Royal Table that day will visit at your table during your meal, posing for photos and signing their autograph. After each Princess leaves your table, you could present your daughter with a beautifully wrapped little box with the charm of that Princess inside. It wouldn't be the same as coming directly from the Princess, but I think it would be pretty magical!
I sure hope this helps, Marissa! Thanks so much for stopping by the Moms Panel with your question and please let us know if we can help with any others that you think of!
Wishing you and your family a Pixie Dusted vacation!
~Jackie