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?

@ZachWeinersmith If you have the money, a Quest 3. It's significantly lighter than any of their other Quest models, and would be easier on a child than the bigger, heavier ones.
@ZachWeinersmith I will add that while I have absolutely no professional experience with dealing with autism, my gut feeling is that there are a range of Quest apps available that would be appropriate and useful in that situation. If you move ahead with this I could even make some recommendations if you wish.