Dear Melissa,
Thank you so much for stopping by to visit us here at the Disney Parks Moms Panel! It is definitely a challenge to keep kids of different ages happy at the same time, but I am pleased to tell you that the
Walt Disney World Resort is one place where that can definitely be done!
I am not sure from your question if you are traveling with another adult or not, but if there is another adult traveling, you might consider splitting up occasionally so that your teens can choose some rides with a bit more "thrill" factor while your little one chooses some with a bit more "chill" factor. At their ages, if you are comfortable, the older two can actually move around the park independently also. You might consider that as an option.
In terms of what fun you can make that is oriented to older kids, you might consider a special experience for each of them. Are they Star Wars fans? If so, perhaps
Star Wars™: Secrets of the Empire by ILMxLAB and The VOID at Disney Springs might be an awesome treat! Another idea might be to do a little experiment and have them try the "Beverly" at Club Cool at Epcot and let hilarity ensue. When riding attractions that have photos, plan ahead to pose for a silly ride photo, like pretending to sleep or "dabbing." There are lots of ways to make your trip to Walt Disney World Resort super fun for guests of all ages - I hope that you have a magical time!
- Jan K.