So, our autistic 7 year old (mostly non-verbal) rarely plays with any particular thing for a long time, but the teachers at school put him in a VR set and he watched water for 45+ minutes.

We're thinking of getting one for his birthday. He hardly wants anything, so it'd be nice to do something special. Any recommendations? Thinking a meta quest 2?

I don't think he generally understands or cares about the gaming aspects of things, so we're more interested in open worlds, especially aquatic ones, that he could get immersed in.
Also not concerned about movement because the little God runs around the world 24 hours a day. He had a six pack at age five. He can do situps from a hanging position.

@ZachWeinersmith If you can afford it, and deal with SteamVR, and have a capable computer (which is likely most gaming desktops these days – our RX 580 was sold as VR-capable when it was new and it's quite old now), maybe a Vive/Index or something?

It's nice to not be tied to Facebook and PC VR has some cool stuff.

No Man's Sky is a game but it's also MASSIVE open world with cool aquatic stuff...
ooh I wonder if Abzu has VR support, it's basically a "look at the pretty ocean" simulator.
Subnautica is amazing but might be a little too creepy, but might be fine.

@ZachWeinersmith Doesn't look like Abzu supports VR. :<

NMS and Subnautica both do, though. NMS is rather systems-heavy, which might be confusing... or it might be intriguing! Subnautica is way more ocean-focused and way less complicated, but has the whole Creepy Vibes thing going on.

And sorry I'm only recommending games, I don't know much non-game stuff for this aside from VR-social-spaces which are really cool, but, basically chatrooms and the whole point is to talk with other people.