If a kid has a physical handicap where he has trouble walking or has low endurance, then sure, but a healthy 7-8 y/o, no way. lol My youngest grand daughter has Zellweger syndrome (really one of the rare disorders under the Zellweger umbrella). She is blind, mostly deaf and has neurosheath and liver problems. Her therapists are hoping to have her sitting by herself by 2 y/o and maybe walking by 5 y/o. If she does, her gait will be unsteady. However, most kids with her condition don't live past 5 y/o. If she does make it past 5 y/o, she would need a stroller or maybe even a wheel chair in order to do WDW. Of course we would rent one for her, but my other six healthy grand children would be walking at that age. Heck, we took our 3 y/o GS to WDW Feb 4th-11th. We did rent a stroller for him, but he spent probably 50% of his time walking. By the time he is 5 y/o there is no way he'd need a stroller.
If I saw a 7 or 8 y.o. child in a stroller, I would not judge the parents because you don't know if the child has a medical condition that prevents them from walking long distances. That being said, I think that
healthy children should walk. Period. Set up your expectations before you go on your trip. If necessary, prepare your children by taking walks with them to get them in shape.
This aversion to exercise contributes to obesity, Type 2 diabetes, and other health problems (Google Metabolic Syndrome). If you can't get your kids motivated to walk while they are at
Disney, what can you expect from them in their day to day life? And if a healthy kid who is normally full of energy is slowing the group down because they feel that there is too much walking, then I would suspect that the child is trying to get away with something. I find most healthy, active kids have a ton of energy when it's something they
want to do, not so much when it's something they perceive as tedious or boring (like walking). I say, don't let 'em get away with it. You won't be doing them any favors.
Healthy kids should do just fine with regular rest breaks and if they are kept well hydrated.
I know with my DD (age 9), the whining about walking commenced about mid-day. I'm 50 y.o. There is no way that I am in better shape than she is. This was the time of day when the park became un-fun for her.
So we retreated to our hotel pool. Remarkable recovery there once she got in the pool! All of a sudden, she had more energy than ten kids put together!
My mother and uncle used to regularly walk upwards of ten miles a day (even more on weekends!) because they had to walk in order to get anywhere. Grandma didn't have a car, and Grandpa took the car to work. Same with my in-laws who grew up in the same generation. They were very healthy and robust. Back then, nobody ever even heard of healthy kids requiring strollers for a few miles of walking.
Walking won't harm your kids, but inactive lifestyle will.