Hi Tamara,
How fun to be bringing your Mothers to Disney for their first time! My Mother joins our family on many of our Disney World vacations. She too, is over 60 and thoroughly enjoys making memories with her grand-kids at the Parks. Her absolute "must see" attraction is
Soarin' at Epcot. She could ride this over and over again. She also loves the
Kilimanjaro Safaris too. In addition, she enjoys
Mickey's PhilharMagic (she likes watching the kids trying to grab the 3D items that are popping out at them). She's not much of a thrill ride person, but likes the Fantasyland attractions as well as
Splash Mountain. She also enjoys riding
Kali River Rapids with the kids. You'll find that there are a lot of shows for the grand-mothers to enjoy.
Be sure to see Fantasmic, IllumiNations and Wishes as well.
Have a wonderful vacation,
Kaylene