Depends on the four year old. We didn't with our four year old twins because hubby hated pushing a stroller around in crowds and they were fine. And we went from EMH to fireworks! They fell asleep in the shows in the afternoon and other than that they were having so much fun that they never complained about walking and never asked to be carried. They were real troopers. Though we got rid of the stroller when they turned two so they were used to walking at amusement parks, hikes, boardwalks etc. It depends on your child and what they are accustomed to.