Hi, Savyvann! How nice that your family is getting together in Disney World!
One thing you can do as a family is simply enjoy your resort! So many times, we rush around to the parks and forget what is right in our own hotel waiting for us . . . pools, hot tubs, bars, restaurants, play areas, game rooms, and more! Take a day to relax and enjoy each other's company!
Another option would be to visit
Downtown Disney. Here you can shop, enjoy some wonderful restaurants, rent a boat, catch a movie, or just find a comfortable spot to enjoy the Florida Sunshine! Downtown Disney is a destination we visit during every trip.
I hope you have a great time with your family!