I took my boy to the gym they have for the local ASD group and it was kinda good and kinda discouraging, and quite hard work. The format is they organise a sequence of things for the kids to do as a group in order, e.g. walk up a ladder, turn around and fall backward onto a landing cushion thing, wlak along a beam swing on a rope, forward rolls down a board etc. So it teaches them to listen and follow instructions and attentiveness and physical components. The kids all there do it at a canter and can all talk, I'd be hard pressed to pick them as ASD kids except one or two. James of course can't talk or follow instructions..the discouraging thing I feel is he's in a group of Autistic kids and within that he's the 'worst', which is how it was in the course we went on.
But I've got to remember that the other kids are older and have done some years of ABA, as one Mum told me her son couldn't talk either at James age.

At home I saw him look at and grin at two other kids (Andrew and Chris) that were trying to enagage with him and bouncing a ball off his head on the trampoline. Strange as it may sound I have never seen him even give the slightest awareness that another child is anything more significant then a fence post that needs to be walked around before, let alone at them.