Count me as a person wondering what the heck I am going to do when 3.5 yo dd outgrows her stroller.
While I find these types of threads completely pointless, I am compelled to share yet another valid reason that a perfectly healthy 3+ yo might be in a stroller.
I walk everywhere. Errands and exercise. Every single day. Most places I go are one or more miles away (one way). On busy streets with poor visibility and NO sidewalks. This means that at least once a day I am walking for at least 45 minutes and often much more. I am walking on sheer ice, huge mud puddles, slush, blazing hot pavement, cracked and heaving pavement, gravel, etc..... I am walking in the snow, sleet, rain, hail (only once), blazing sun. I am walking in anything from -10 degrees up to 100 degrees. I also walk up and down VERY steep hills. I am an adult that can gauge my comfort level with a better scope of the "whole plan". I also have access to gear (such as cleets and gortex) that is simply not made for 3 yos. I have more balance. I could go on.
Dd has a great jogging stroller with a complete cover. She can be totally shaded in hot weather and completely enclosed, wrapped, and bundled in cold. To expect a 3, 4, 5, or even 6 yo to do what I do daily is too much. Not to mention dd loves riding in the stroller, which in my book is a good enough reason.
However, I do make a point to give dd access to many exercise opportunities, usually more than once a day.
My stroller never goes in the car. But I do have a small umbrella stroller that is brought out maybe twice a year for museums, amusement parks, airports, zoos, etc..... She walks under her own power at those places but likes to have the stroller as back-up if she wants it after a long day.