Toy aisles and toy stores are frequently populated by exhausted parents standing around while their children entertain themselves checking out the toys. The kids are happy enough. The parents are content just to have a few minutes to themselves. Toy retailers typically try and dissuade this behavior.
Meanwhile indoor playgrounds/play centers are a huge and growing business. They are happy for parents to unleash their children while they make their money from entry charges, selling cups of coffee to the parents and snacks for the kids.
Despite having a huge inventory of toys play centers never actually sell toys that I have seen. Tearful children have to leave their new favorite ride on racing car (or whatever) behind when they leave.