Hi Lori,
What great ages to bring your children to Walt Disney World. There are lots of character meals to be found in Disney, if you click this link
HERE and then choose character meals from the drop down list on the left hand side it will show all the character dining locations in Walt Disney World.
I may surprise you here but my recommendation for your children would be Cinderella's Gala Feast, this is a buffet dinner held at 1900 Park Fare in the Grand Floridian and as the name suggests is hosted by Cinderella. Also normally in attendance is Prince Charming but the reason I think your children would enjoy it, especially the boys, is that Lady Tremaine and Cinderella's Step-Sisters are normally there. They are hilarious and so in character with their antics, my 10 & 12 year old girls had a fantastic time when we dined there and my friend took her 14 year old nephew there recently and he had a ball too, so it really does appeal to boys as well as girls!
If you don't think your family would like 1900 how about breakfast with Lilo and Stitch and often Mickey and Pluto too at 'Ohana at the Polynesian Resort. This is a fun breakfast for all ages with the best fruit juice ever!
I'm sure which ever character meal you choose you'll all have a great time,
Jo