If one group (children) consistently and independently arrives at the conclusion that there are supernatural beings while the other group (adults) consistently uses authority over the first group to convince them otherwise, it seems reasonable to more believe the first group and disregard the second.
Think of how the world seemed far different when you were a child, and how teachings of man molded us to conform with adult group think, how when someone steps out of line they are ridiculed in a attempt to bring them back in line.
There is unquestionable brainwashing of people against the supernatural.
Or OTOH that large black dog, which may appear like a normal animal could be demonized, the child picking up on the demon. We try to convince them otherwise showing them the dog, petting the dog, saying good dog, grounding the child to use physical senses and ignore spiritual perception.
If a child is truly bothered by something I believe that can be detected by the true parent. If a child is acting out, for perhaps attention, that child is experiencing a form of isolation, which in itself is a issue that needs to be addressed and may be spiritual in nature.
I’m not exactly sure of the meaning of your last question but children have limited ability to communicate, and it is hard to describe the spiritual in our language even for adults - just look at the book of Revelation. They use what they can to describe it.
The Word says that God forms us underground (Ps 139 v15), there are scriptures about people being away from the body (2 Cor 12:2, 2 Cor 5:9, Rev 1:10), and these people seem to be able to think and remember events. The knowledge would exist outside our physical world, the physical body just allows interaction of our soul with this world. If part of our body is damaged, we lose that ability to interact w/ the physical world in that matter.
I said that the innate sense of God comes from conception, not birth.

:dubious: . . . Ermm, no, kanicbird, that is not reasonable at all.