I don't really know the weight limit, but have seen some fairly large children ride in the rental strollers. Older than 5 easy, or not small by any means. As far as your 5 year old not wanting to be in a stroller. We have taken our own stroller for our 4 and 6 year olds...they both normally wouldn't step foot in the thing, however, after a lot of walking at Disney, they fight over who's turn it is to sit in the stroller! We have always taken our own, as the walk back to the hotel with sleepy kids is a very long walk carrying a heavy child! We use our stroller as a pack mule through the airport and use it to carry in drinks and snacks in the bottom of the basket that we bring from the hotel room. Strollers have been a lifesaver for us at Disney even with a 5 or 6 year old.