What is the most spiritually conductive type of wood to make a Ouija Board out of?

You can actually make a Ouija Board out of anything. Be it a piece of paper, cardboard, or should you be feeling particularly risky, you can draw one on an out-of-sight wall or a large span of concrete. You're welcome to add special symbols or your own added flare, but the only things necessary are the letters A-Z and 0-9. Typically writing 'Yes' and 'No' somewhere on there helps too. What you use to pick up the signals can be anything that slides easily along the surface that you choose: a monocle an old broach, a dollar coin... the possibilities are infinite.

Have fun - hope this helps!