Re: need help helping a friend with a SN child. please!
I second the foam pipe insulation.
As for why her legs aren't strapped down, in some cases that is counterproductive and causes tone/contracture issues. I support a woman with spina bifida who bangs the heck out of her legs like that and they can't be strapped down because it just makes her muscles stiffer/tighter. We use the foam pipe insulation on her chair.