@Witness My Fury - No that will not work, like I mentioned, I don't wish to tell my parents I don't believe in that anymore. Telling them something like that would automatically make me an "Apostate".
@OneEyedJoe - My son does not accept things so easily. In fact I'm surprised by how he won't even believe stuff I tell him sometimes without scientific proof.
The reason for me wanting him to ask grandpa questions is that because no matter what answer he is given he will want proof, he won't take someones word for it. The more answers his grandpa gives him and then finds out they are BS the more likely he will be to just plainly start noticing it is BS.