For TS, we love:
Garden Grill (Chip & Dale and good food served family style!)
1900 Park Fare for dinner (I've heard breakfast is good there too, but at dinner you get Cinderella, Prince Charming, and the wicked stepmother/sisters. I loved their desserts, and that happens to be an important factor to me.)
Sanaa (Excellent food, not sure little ones would like it as much - we're a multicultural family so our kids are adventurous eaters)
Crystal Palace breakfast (Pooh and Friends, and pretty good food. Everything has always been fresh and tasty when we've been there. Try for an early reservation before the park opens)
Cape May Cafe dinner (as long as you like the specific seafood items they serve. We love crab legs, so we liked it a lot. They also have some yummy desserts.)
If you want to do a signature, we LOVED Artist Point. My kids really enjoyed their food better than any other siganture we've dined at. The service was outstanding too, and the kids really liked the paint-your-own white chocolate puzzle dessert.
If you're on the regular dining plan, you'll have plenty of CS to use up too - here are a few of our faves:
Pecos Bill's has pretty yummy burgers and taco salads, and the toppings bar is always fresh and clean. (or so has been our experience, anyway.)
Contempo Cafe in the Contemporary Resort is easy enough to get to from MK, and has some interesting and yummy options.
If you happen to be staying there, the Centertown/Old Port Royale CS at CBR is good. I don't think it's really special enough to go to the trouble of getting there if you're not staying at that resort, but the food was always hot and tasty and they have some yummy options I didn't see just everywhere.
Oh, and a great use for a snack credit or 2: Writer's Stop in DHS. Everyone seems to rave about the Carrot Cake Cookie, which was good, but we were really wowed by the Chocolate Danish. So yummy, way better than the chocolate croissants you find everywhere else.
Have fun planning all the yummy experiences you'll have!