I think sometimes people don't understand what "constant" supervision means, and how exhausting it is. For a special needs child like this one, it means CONSTANT, not the kind of loose supervision you'd give a typical 9 year old at this park. I have a friend who has a child brushed with autism, and around water you had to watch him constantly. Not check on him, WATCH him because he didn't mind having his head underwater obnoxious, and he couldn't swim. As a result he was constantly nearly drowning. We went on a beach vacation with him and his dad - who was otherwise a great dad - didn't get this at all and it involved a couple angry fights between the couple. "Rob, when you watch him at the pool you have to WATCH him!" Rob was treating this child as you would another 4 year old, where you could glance up from a conversation every 30 seconds or so and make sure the child was okay. He'd be halfway to drowning doing that.