Nope, the Kim Possible thing doesn't cost money. I haven't done it yet, bit it's free.
If you want a yummy dessert, visit the Norwegian bakery! My favorite is the lefse, but everything is yummy. And if you want a second yummy dessert, get some Kaki-Gori in Japan (it's the yummiest sno-cone ever!)! And if you want a third yummy dessert, visit the French bakery! My favorite is the strawberry mousse, but I don't think they had that last time.
You probably already know this, but utilize FastPass!
Don't miss the American Adventure at the American pavillion. It's AMAZING and makes you proud to be an American!
And I can vouch for the "wet burrito". !Muy bueno!
Spaceship Earth recently got a re-do, so make sure to check it out.