Hi Deepti!
Thanks for your question. There are private companies in the Orlando area where one can rent myriad strollers, but I can say, the
strollers that
Disney offers was more than enough when my children were preschool aged.
The
twin strollers Disney offers for rent are large, sturdy, easy to push, and has decent covering to protect children (mostly) from the elements. The first year we went to Disney when our children were preschoolers, it was cumbersome for us to bring our own strollers. Since that visit, we elected to just rent Disney strollers for the
theme parks and when at
Disney Springs. The rental cost was reasonable, and it greatly simplified things when having to travel, enter, or exit the theme parks and resort hotels.
There are many options, but I feel you will be pleasantly surprised with the double strollers at Disney. It is large enough to comfortably fit both of your children, and provides a place to rest those little feet from all the walking in those fun, but very large theme parks. :-)
Hope this helps. Have a magical time when you visit
Disney World!
Terry