Sandy - My DD is 8. On our last trip (her 10th), I tried to find some stuff to make the trip unique, which gets hard when you go every year. One of her favorite things was the day she and I rented a Water Mouse speed boat at the Polynesian. We zipped around for 30 minutes and she loved it. If you decide to do that, rent at either Poly or Contemp or GF. Don't rent at Downtown Disney. The boats are faster and you have more space from the hotels.
Another thing we did was an Illuminations Cruise. They are hard to get but definitely worth doing. You can check the dedicated thread to learn all about them. The best part was that once we were in open water, the Captain let my DD drive the boat. The expression on her face when she took the controls of a boat loaded with adults was priceless.
I haven't done these things, but there is storytelling around the fire at AKL. Also something at Fort Wilderness. Do they still show movies outside at Fort Wilderness?
Loads of little things like that can really make a trip special at that age.
Steve