My son is 5. We haven't used a stroller in a few years, and I had no intention of using one on our trip. Well- all of my friends who do annual Disney trips told me it would be wise to use one. Thankfully I listened!!! We have annual passes to an amusement park here, as well as the zoo, and are always out and about...my son plays soccer/baseball/football/golf...but I am so glad that I didn't make him walk all of the parks all day/night. I can't tell you enough how glad I am that I rented a stroller...we had early breakfasts, took breaks from the parks to go back and "relax" for a bit at the resort- but "relaxing" to my son meant swimming and going down the volcano slide. Anyway, we went back to parks and were there until closing.. We did 8 nights. No possible way he would have made it with out a stroller! And if you have dining reservations- it comes in very handy to be able to speed walk to make it to the restaurant in time.lol