Hi Kerry,
I have several recommendations for you and your family for character dining. I understand about the age difference of your children as I have a 14 year old boy, 11 year old girl, and 8 year old girl. If you have Quick Service Dining, I assume you will be paying cash for this meal. I would suggest booking an Advanced Dining Reservation for lunch because it is less expensive, and you will still get fantastic food and character experiences. At Magic Kingdom, our favorite restaurant is The Crystal Palace. You will see Pooh, Piglet, Tigger, and Eeyore. My 14 year old thinks Tigger and Eeyore are cool and will pose for a picture with them. At Epcot, we love the Garden Grill Restaurant. Located in The Land, this rotating restaurant has great food (dinner only) and you will meet Chip, Dale, Mickey Mouse, and Pluto. The Princess Storybook Dining at Akershus Royal Banquet Hall will allow you to meet several of the Princesses but not Cinderella. My son really likes meeting Jasmine. Tusker House at Animal Kingdom has Donald's Safari Character breakfast with Donald Duck, Mickey Mouse, Daisy Duck, and Goofy. If you decide on a breakfast, I would either book at 8 am or at 10:30 am. The 8 am will get you in the park before open and the 10:30 am will let you perhaps eat an early lunch on breakfast food. Please send me a follow up question if I can help you further, Kerry. Have a magical dining experience!