S.Z.
We have been on the Wonder, and we're headed back next month. You'll love it! :)
There's clubs for the kids, so you can occasionally have adult time. The food, entertainment, crew, pools - everything is great. There will be game shows, competitions, dance parties, and more. You won't be able to do everything offered.
Have you been on a cruise before? If not, here's things I wish I had known before my first Disney cruise.
You can just walk off the ship in port, and explore on your own, and it's possible (especially on Castaway Cay) to have a great time on your own. But, booking a shore excursion will let you travel farther away from the ship, and explore places you couldn't walk to.
It's possible to opt out of the tips that will be charged to your room/credit card, but I wouldn't. Sometimes, that's all the pay the crew members receive. Plus, you'll want to tip, trust me - they'll treat you all exceptionally well! If necessary, start saving now so you can give the customary tips (about $20 per day per person).
Set aside some money for at least one professional photo, too. There will be plenty of portrait options offered. If you buy the CD of all the photos, you can get all the prints (all enlargements) for about $50 more.
HAVE FUN! It will be amazing! :)