The ones we've liked the best so far with our kids are:
Tusker House Breakfast
Sci-Fi Dine -in Theater
Hollywood & Vine Play 'n Dine breakfast (my husband's favorite breakfast)
Chef Mickey (not my favorite but the kids loved it)
Crystal Palace
Teppan Edo
Kona Cafe, the food was pretty good but service was slow for us, maybe you'd have a different experience.
My very favorite was Spoodles, but now it's closed. I noticed that Flying Fish has a very good childrens menu though, which is unusual, so we're definitely going there next time.
My ADR list for next February with 2 kids (6 & 2 by then) will be:
Epcot - Princess Storybook breakfast or lunch, Le Cellier dinner (different night)
DHS - 50's Prime-Time lunch
Magic Kingdom - Crystal Palace breakfast or lunch, plaza dinner?
California Grill dinner (sans kids, date night!)
Flying Fish Dinner