Dear Stephanie,
Thanks for reaching out to us here at the Disney Parks Moms Panel with
your ticket question.
The simple answer is yes, you can purchase seven days of tickets and then use more than one "day" each day if you enter a different park. So if you start your day at the
Magic Kingdom, for example, then go back to your Walt Disney World Resort hotel for lunch, and then head over to
Disney's Hollywood Studios for the afternoon, then you will use two "days" worth of your tickets.
However, if you start your day in the Magic Kingdom, leave the park for lunch or for another reason, and then go back to the Magic Kingdom, you will only be using one day of your ticket (you can re-enter the same Park multiple times in one day).
Hope that helps with your planning! Have a magical trip!
-Jan K.