There is truth in
@jesusiswithallofus's point. The PSVR warns about it not being suitable for children under 12 every time it starts up. There are several factors that may be considered:
-The eyes are still developing and prolonged exposure to close screens could be damaging.
-The IPD (interpupillary distance) of the headsets caters to adult-sized heads, as such children may not be able to get a clear focus in both eyes at the same time leading to eye strain.
-Children (generally) have poorer spatial awareness skills and may be more likely to have an accident by bumping into things. Even as an adult, it's complicated to be mindful of your real-world surroundings when you're immersed in VR.
-In small doses VR play won't do much harm, but kids may have a tendency to play for far too long if unsupervised and/or make themselves sick by not knowing when they've had enough.
-Online VR games are full of griefers and kids saying all manner of things young ears shouldn't hear (or gesturing in inappropriate ways they shouldn't see).
Of course, all kids develop at different rates and to different skill levels, but manufacturers cover their backsides by uniformly saying they're not suitable for children. They also make games and educational interactive apps for children.
As long as a responsible adult supervises the play space, time spent, and monitors any online chat, there won't be any problems.
Anyway, I just wanted to chime in and offer some supportive insight and reasoning.