Common conception is that children are afraid of ghosts because of their wild imaginations. As they get older they stop being afraid. At some point, many stop believing in ghosts.
But what if this is all just a defense mechanism? What if you had it right as a child? It is our theory here at Buzzkill, that children are the most susceptible to seeing ghosts, because they have not yet closed-off their minds to the concept of the spirit-world. Instead they interoperate actual paranormal events as they happen, and only when mom or dad comes in and makes-up some excuse like “the wind” or "the house settling” does the connection get dropped.
There is a reason people exit a room quickly after they turn the lights off. In the absence of light, the other senses perk up, which could mean picking up on a paranormal event that you normally would walk right by.