Outside of character buffets, here are a few with atmosphere that kids might enjoy:
50's Primetime - kids love seeing their parents get in trouble for putting their elbows on the table or not eating all of their vegetables.
Sci-Fi - The cars are unique and our daughter liked the "independence" of getting her own seat (even if we were right behind her).
Teppan Edo - I guess it depends on the chef, but ours really played up to our daughter, letting her pose holding the spatulas as though she were cooking.
Beaches and Cream - if you order the "kitchen sink", it can be exciting for young kids.
Boma - good food, and visiting the animals before or after can be fun.
O'hanas - has coconut races, that kids your age would probably enjoy.
Corral Reef - the aquarium is pretty impressive.