Whispering Canyon, although very good food and fun atmosphere, is rather loud. I would pick it if the child was a few years older. For a 3 yr. old, I would probably choose a place with characters. Why not do it a Chef Mickey's? Of course, since you have breakfast reservations, you might prefer dinner. My recommendation would be Garden Grille in Epcot. Love the food and characters. You might want to check into 1900 Park Fare. A bit expensive, but she could eat with Cinderella and Prince Charming. Possibly have a chance to try on the glass slipper and/or dance with Prince Charming.