Yes, I always say that it's pretty arrogant of us to think that we know all there is to know about reality. I'm always a skeptic about people's claims--we ignore the times our gut was wrong, for example, and only note the times it was right--but I also think there's a lot that happens that we don't understand. Does that mean it's not real? There was a time when we didn't understand germs or atoms or other things we couldn't see, too. Maybe science just hasn't caught up yet? Who knows.
I definitely wouldn't make a big deal out of "spooky" happenings for my child. I'd be very matter-of-fact about that. But I'm always a big fan of trusting one's gut. The more in touch you are with yourself and your surroundings, the more often it's right on, even when you don't know why it's right on.