I have a grandkid that has had them. Kids running temps see devils or spooks it's common. First one our grandkid had scared me and the rest of the family out of our living wits. His dad my have had the same. Kids out grow feverol seizures usually by puberty. The danger is it can be a sign of a far more serious medical condition called epilepsy.
It’s late and my sign off time. Something to consider. Search epilepsy +hallucinations and see what happens.
1. I know of no psychologically impactful medical condition that causes 2 generationally distant and geographically distant children to see THE SAME THING.
2. NGZ and brother are bright enough to check out any medical issues. They really are NOT clueless.
3. These sorts of medical problems do NOT just spring forth with ONLY these 2 isolated incidents. There would be other at least significant, if not abundant cues well along the way that such medically related things were amiss.
4. Of course there’s no harm in getting brain scans etc. . . . except to the wallet.
5. UNLESS there are other medically related symptoms that would have shown up persistently along the way by 4 years old, I’d call such a very likely waste.