LogFAQs > #979435073

varied, but would start with 5-10 minute stints in non-realistic experiences. Maybe doing just 1 or 2 songs in beat saber, which can work out well if you have several people taking turns so they get a reasonable break between short time periods in the headset.

Once they can go more like half an hour I have them play A Fisherman's Tale, which is a fun puzzle game on the VR that I enjoyed a lot. Still not super realistic, but good for a level above simply standing in place and waving your arm at flying blocks:

https://gamefaqs.gamespot.com/a/forum/a/a2706632.jpg

And they can either do that entire puzzle game in around 90 minutes if they can take it, or break it into three 30~ minute chunks.

And I'm sure it's not the same for everyone, but I'd say totally 5-10 hours in VR over maybe 2 weeks of small sessions should work for most people.