I'm a lottt younger than that, but I often bring my Nana with us when we go to Disney World, and she loves the Magic Kingdom!
Some of the attractions we take her on:
- Jungle Cruise
- Pirates of the Caribbean
- It's A Small World
- The Many Adventures of Winnie the Pooh
- Mickey's PhilharMagic
- Peter Pan's Flight
- Snow White's Scary Adventures
- The Haunted Mansion
- Walt Disney's Carousel of Progress
- Monster's Inc Laugh Floor
- Tomorrowland Transit Authority
Also, Main Street USA is full of entertainment for those who want to go at a more relaxed pace, such as the piano player near Casey's Corner and the Marching Band and especially the barber shop quartet - the Dapper Dan's!
Stopping in at Tony's Town Square restaurant is a favorite of my Nana's as well, because the classic italian food and nice atmosphere makes for a good meal. And even stopping in the Plaza Ice Cream Parlor to get an Ice Cream sundae is lots of fun!
And last but not least, watching the fireworks is a beautiful way to end the day. That experience is really worth it to go to the Magic Kingdom.
There's TONS to do at that park for people of ANY age group, and I feel like those who are older actually would appreciate it more. I would recommend Magic Kingdom over Animal Kingdom and Disney's Hollywood Studios for sure, because there really is a lot to do there! And it is CLASSIC disney. So, I would give it a shot! I'm sure you would have a lot of fun!