How to transfer child's drawing onto wood?

My son drew a really nice blue crab at school. I scanned it and cleaned it up a little in the computer and now I think it would look really nice on a piece of wood. There is no background, just a crab floating on white. What is the best way to get it on wood? Definitely don’t want the white paper. I can print it out with any kind of printer: laser, inkjet or copier.