Kiddie Rides R US?

I find it strange that many storefronts have coin-operated kiddie rides outside.  Some appear to be in operation, although I've never seen anyone using the machine, while others have the coin insert taped over so I guess they are just for decoration?  Haven't seen so many of these rides since my childhood trips to the supermarket, but I find it quite amusing to see all over Astoria.  Here are 3 within a few blocks of my apartment: