Since you will have so many credits, you will have a lot of choices to make. I will give my usual caveat - make sure you know that you really want the deluxe dining plan with 2 small children. You will be spending a lot of time sitting in restaurants, getting to restaurants, waiting for tables, etc. Many people don't realize how much that might eat into their park touring or down time.
Kids usually universally like these buffet & fixed-price meals, for the characters:
Chef Mickey's @ Contemporary
Akershaus Princess Dining
Cinderella's Royal Table
Hollywood & Vine
Crystal Palace
'Ohana Breakfast @ Poly
1900 Park Fare @ Grand Floridian
Whispering Canyon @ Wilderness Lodge
Doesn't mean they have the best food, but generally they are okay and the characters are fun.