Hi there, Nicole!
There's no easy answer to that question. Walt Disney World Resort is so packed with fun and entertainment that some people claim you can't see/do everything in a lifetime!
As you start to plan your time, your first step might be to check out the
Vacation Planning page on the Disney Parks Web site. You might also want to order your complimentary Vacation Planning Kit, featuring a fabulous, info-packed DVD.
You'll want to begin a "must-do" list. Having things written down will bring lots of clarity to the planning process. You will quickly discover, for example, that your travel party is really favoring one or two Parks. In that case, a Park Hopper might not be necessary, and you can plan to focus more of your time on, say Magic Kingdom than on another Park.
Check out some crowd predictor sites, too, TouringPlans.com, for example, uses historical data to determine the crowd levels every day of the year. Other sites like MouseSavers.com can assist you in picking not only the least crowded times that work with your schedule, but also the most economical.
When you have started carving out your plans, hurry back to the Moms, and we can begin to take that initial list and make it into an itinerary that is "practically perfect in every way".
Happy planning!
See you later, celebrator,
-Deborah B.