Hi there, Jessica!
There are several ways to approach "ticketing out" a vacation with a large traveling party. Since I don't know the duration of your stay, I'll throw out Park Hoppers.
That's my favorite option, since it provides the flexibility of moving between multiple Parks in a single day. With children as young and 3 and 2, you will likely visit the Magic Kingdom more than once -- or would like to have that option open to you. The Park Hopper will allow you to visit Parks as often as you'd like.
If your chidren need to decompress mid-day, the Hoppers will allow you to split your day up; a regular Magic Your Way base ticket gives you daily entry into a single Park unlimited times over one day, but adding that Hopper option actually opens up a level of scheduling flexibility you might appreciate.
Check out the
variety of options available to you on the official Web site. Do feel free to
drop me a line with more specifics, and I'll be glad to help you plan your ticketing method,. Parks itinerary, and so on.
Have a great time -- and happy anniversary to your folks!
See you later, celebrator,
-Deborah B.