I remember being interested in these as a kid....but if you are curious about the supernatural / spirits / magic and so forth, not sue what to believe, you should check out James Randi. This is copied from wikipedia, but you can read about him anywhere:
The James Randi Educational Foundation (JREF) currently offers a prize of one million U.S. dollars to anyone who can demonstrate a supernatural ability under agreed-upon scientific testing criteria. Similar to the paranormal challenges of John Nevil Maskelyne and Houdini, in 1964, Randi put up $1,000 of his own money payable to the first pe