This is for people that I live with.
I don’t mean any lame team building exercises, but casual group activities. It could be something mundane like organizing a trip to the store together. Movie trips would also be fine as would showing something on the home projector, though I feel like there’d be more distractions and temptation at home.
It’d depend on the severity of their autism and stuff.
But going for a walk together or anything without big crowds. If they’re ok with crowds, go shopping together or something. Any normal activity can be ok unless they’re the type to get overstimulated.