With what I believe about ghosts, children are much more likely to see them. As the kids have open minds unlike us.
When we were in Texas my brother rarely slept as the “people” in his room kept talking all night keeping him up. He was like 3-6, my mom told him to tell them to be quiet so he can sleep, and that they shouldn’t be rude. It worked.
One morning he came out if his room and said “mommy, call grandma, something is wrong”. My grandpa had fallen and gotten hurt really badly, he was in SC. When my mom asked my brother about it he said the people in his room told him. A week later he didn’t remember any of it.