We took DS for the first time at that age and stayed at POR. His favorite part of that trip was Disney transportation! He LOVED the buses, the monorail and the boat ride from POR to Downtown Disney. If your kids love the monorail, be sure to take it from Epcot to MK (or vice-versa.) We did this several times and then took the bus back to the resort. He loved all the rides other than The Great Movie Ride (we had a REALLY loud guide.) His favorite rides were the Goofy roller coaster, Small World, Tomorrowland Transit Authority and all the Dumbo-type rides. He loved the characters. At Epcot, his favorites were The Living Seas and the jumping fountain outside the Imagination pavillion. Both of my kids (DD two years older than DS) were frightened by the Bug 3D movie at AK. Oh, they LOVED the Boneyard at AK and the Honey, I Shrunk playground at MGM. Have fun!!!