Making a box call

[Mowoodsman]

So, I'm debated getting into making my own calls.  Not to sell, just to use.  I needed some tips from you guys.  Here are the questions I have:

1.) What type of tools will i need to make the calls?
2.) What is the best wood to use?  Do you buy commercial cut wood our use natural stuff?
3.) Do you need to seal it?  What type of material do you use if you don't want to chalk it?

Right now that's all I can think of.  Any input would be great. Thanks!