No PlayStation VR for kids, says Sony

Grown ups get all the fun. No, seriously, they do. A safety notice as part of the PS4 3.5 beta firmware update uncovered by KGrizzly on Reddit states clearly that the PlayStation VR headset is "not for use by children under age 12." This adds to the precedent already set by Oculus and Gear VR which already has a 13 and up safety guide. But why is this? I've done some digging and VR simulation specialist