I second Raglan Road...ask for Nate. He was our waiter the first night my brother joined us...my brother liked it there so much he wanted to go back for his birthday dinner and we asked to be seated with Nate. After a few weeks he still remembered my family and made the whole experience that much better!
With kids that young I'd definitely treat the family to a meal at Trex. The menu seems good enough to actually enjoy the food and not just the entertainment. Be aware, they don't participate in the Dining Plan.
We have three favorites at DTD. We love RFC, TRex, and HOB. There was nothing we didn't like about HOB! Even my picky eaters left there stuffed! RFC and TRex have good food too, but it's the atmosphere that gets ya!
IMO, your family would really enjoy Wolfgang Pucks. The menu selection is amazing. Everything from Brick Oven Pizza to fresh Sushi. Fun atmosphere, also some great desserts that are big enough to share. Have a great trip.
I would agree with the suggestions for T-Rex or Rainforest Cafe, as lomg as your children don't mind loud noises. Both restaurants have audio special effects that can be too loud for children who are sensitive to loud noises, like thunder. Another suggestion is Planet Hollywood.