Are you looking to artificially age the wood?
A bit more information may be helpful.
How much wood?
What type of wood?
What is it going to be used for (indoors or out)?
I've heard of people "aging" wood by painting it with Coca-cola and putting it in the sun, but I've never tried it myself. I'd be afraid it wood attract bugs. There is also a way to do it with borax. You should be able to google it to find specific instructions.
You could also try something like this:
But please, if you live within 300 miles of me, wait until it rains again.
And with a fire extinguisher in your other hand.