you stay at Fort Wilderness? When we stayed in a cabin there once, we rented a golf cart for the week and did a lot of driving around, visiting the different playgrounds, and enjoying the main pool w/ activities, and of course the campfire/movie. We fished there too. The kids enjoyed that as much as the parks!
We also try to stay at different resorts, or at least space them out (not staying at the same place for a couple of years). When we went 3x's in one year, we skipped parks too.
We try different restaurants... the first couple of years we went, we did almost every character meal too, and were tired of it all. So we started doing counter service places. Now we're back to doing a couple of character meals per trip, since we've hardly done them the past couple of years.
A tip I read here... 1 day, do a 1/2 day park, go to the bus stop, and get on the first resort bus you've never been to. Go there for lunch and resort exploring. We now love doing that!!
DH and ds6 are doing a bass fishing excursion our next trip. DH did the Richard Petty racecar passenger experience once. You and kids could watch.
Watch Wishes from the Poly beach instead of inside the MK. Or watching from the GF marina w/ snacks from Gasperilla's is fun too.
Hidden Mickey hunts are great, whether at a resort or the parks. AKL has a great one (and it's a really great resort to just visit!)
Visit the boardwalk at night... strolling magicians, jugglers, mid-way games, etc. Make an adr for dinner at one of the restaurants and stroll around.
Swan/Dolphin has a really nice playground/sand area (we don't pool hop!) and swan paddle boats. Mini golf right behind swan/dolphin too.
Pin trading. Snacking around world showcase w/ the kids (everyone shares 1 snack per country). Passports and masks at world showcase.
I'm sure you'll get a lot more good ideas! Have fun!!