Ok, if you want a loud place, go to Whispering Canyon in the Wilderness Lodge. It's really loud, the servers are yelling, telling stories, asking people to do things. They even have a pony run for the kids, all while everyone is eating. They get their little stick ponies and ride through the restaurant!
Also, Donalds Safari Breakfast at Tusker House in Animal Kingdom would be a great place. It's buffet, so no waiting. And it's loud. There's music, the characters dance, they give the kids instruments that they can beat on or rattle.
Hope you have fun!