Picture (black and white OR color) printed from a laser printer on regular paper
Block of wood (try for smooth and light colored, we used pine)
Paint brush (and/or a sponge brush thing)
Here are some picture examples-
So now that you are rubbing off the paper-
After the paper is gone you want to rub the wood a couple of times to get any small amount of residue off. I used a somewhat damp paper towel for this part. Then, when the wood is still damp and the picture is looking awesome, Mod Podge the s*** out of it. You don't want to do more than one coat, so just make sure you get a nice coating on the first shot. After that, just let the Podge dry and you are all set. Say hello to your new piece of art!
The most problems I had were before I used the wash cloth for the entire picture and the paper wouldn't come off completely. There were a couple of suggestions for this if it happens to you. The first one is to wet your picture again before you Podge it, making sure you can't see any of the white residue. The second is to rub vegetable oil on it before putting the Podge on it. I think the vegetable oil worked better in this regard, but there are so many variables between pictures that that might not have had anything to do with it.
So now that you've read and seen my steps and trials, feel free to check out the original site that I got the idea from- Wooden Picture. She has a handy dandy video to accompany hers so you may want to watch that for a nice visual. As you can see she did hers slightly differently than I explained it but I gave you the best description that I could through my own personal trial and error. If anyone has any questions feel free to leave me a comment below and I will be sure to answer. Have fun!!