Hey, Vickie!
Welcome to the Disney Parks Moms Panel. I am so glad you asked this question because everyone wants to be able to enjoy the theme park attractions in style and comfort.
After my own research and speaking with a Cast Member to confirm, there are no posted weight limits on theme park attractions. There are recreational activities, such as the
Wild Africa Trek, that do have a weight limit. There are height requirements for many attractions that you may see on the Attractions page.
Websites, such as allears.com, provide many photos (allears.net/dlr/tp/seatpix.htm) and testimonials (www.allears.net/tp/ridsiz.htm) on attractions that will help Guests determine comfort and access.
Most attractions have a private area where Guests may sit in a "test seat." Just ask a Cast Member at the entrance to each attraction you are concerned about for advice on seating and comfort.
I hope this information helps. Please let me know if you have any further questions.
Vickie, enjoy making many Magical Memories!
~Jason ºOº