You've already gotten so many great tips on here and you have a good idea yourself, POFQ! My son is 5 and has autism and we've stayed at many of the resorts, POFQ is probably the best moderate and is fairly quiet because it's so small. Wilderness and Animal Kingdom are also good or Contemporary in the Garden Wing if you want to stay on the Monorail loop. Don't stay in the main tower if you are looking for quiet for the garden wing is quiet. I think for 1st trip for a kid that age, I'd go for Animal Kingdom or POFQ depending on your budget but either will meet your needs. If you have the time, take him to Animal Kingdom Lodge just to tour the lodge because you can still see some animals from the lodge and Boma has a lovely buffet. Get the noise cancelling headphones, they are fantastic for the rides. Good luck!