I have been seeing wood candles around for a while now. Target even has a wood veneer candle right now.
I decided to make my own. My husband and I were driving home one day and I said, "Stop!" We pulled over next to a pile of tree limbs and loaded up the car. We cut them up and made little votive holders. Honestly, they are more for looks than anything. I don't think burning a votive in a wood holder is safe, but I like the look of it anyway.
One thing I realized, after the fact, is that seasoned wood would work better as we did see a little bit of splitting as the wood dried out.