In around 14 billion years many life forms have existed and died in this universe so this is not a good idea..you never know who or what may answer.
How to call spirits?
Meditation can calm your own spirit enough to sense those around you. I wouldn't go near a ouija board. Many people apparently die after using those. Seances are good. Internet research is a good idea before you do anything though.
Ouija boards but they are way dangerous and a seance is always a good one (: Best thing to do is interent research but those tow are the most common.
Soul