Hi Erika,
Welcome back and thank you for sending in another question. As previously mentioned in a prior answer, I recommend purchasing base tickets for your first trip to Walt Disney World Resort. As for an itinerary, I'd suggest Magic Kingdom on day 1, Disney's Animal Kingdom on day 2, Disney's Hollywood Studios on day 3, Epcot on day 4 and Magic Kingdom again on your final day. With the ages of your children traveling with you, I'd dedicate 1-2 days for Magic Kingdom. The Parks are all within about 20 minutes or less of each other, via the Walt Disney World Transportation systems. Be sure to note you must have purchased an upgraded Park Hopper ticket in order to "hop" between Parks on the same day.
If you are staying at a Disney Resort Hotel, you'll want to take advantage of Extra Magic Hours. When viewing the
Park calendars, note which days offer exclusive hours to Disney Resort Hotel guests. Arrive as early as possible to tackle the most popular attractions in the morning. If you'd like to provide me the exact dates of your intended Park days, including whether or not you are staying at a Disney Resort Hotel, I'd be happy to give you a more detailed itinerary.
Happy planning, Erika, and I look forward to hearing from you soon!
Sherri