Decoupage Wood Slices make great Christmas tree ornaments!
Last Christmas I decided to organize a handmade Christmas ornament exchange with a group. Before the exchange deadline came due, I tried out several ideas and finally found the one I liked the best. It was decoupage wood slices! They were so fun to make that I made oodles of them -- enough for the exchange, enough for some special gifts to friends, and more than enough for my own Christmas tree. They won't break and were ever so cute so I wanted to make sure that my grand-kids would have plenty to put on the tree wherever they liked.

I found wood slices at a local 100 Yen Shop (like a dollar store). I tried to get the ones that had interesting bark -- some appeared to be birch, some had really curly bark, and all had a nice natural look. Others were round and had a light exterior wood and a dark inner core. None of them were pre-drilled with a hole for ribbon or string, though. They were a bit too small for that anyway. I was able to find several cut at an angle, which also gave them a nice look and made me nostalgic for the bigger wood sliced decoupaged pictures that people like my grandma had hanging on their walls when I was a kid.
The decoupage method is fairly easy once you get the hang of it. For most of them, I sized a print according to the size of the wood slice and color copied it. As there are no art supplies shops near me, I used hair spray as a fixative so the colors wouldn't run once I started to decoupage. For a few of them, I used some old wildlife stamps that my mother had affixed to a box she sent me many decades ago. The stamps were starting to peel off and I was planning to get rid of the box anyway so I rescued the stamps and used them in this project.
I found that gently tearing the paper, rather than cutting, gave the most natural edges to the print and made it blend in nicely with the wood slice.
Next, on to decoupaging. Back when I first learned how to decoupage in the 1970s, I used varnish. But, a couple of years back I learned about Mod Podge. It is easy to work with. So, I Mod Podged the print onto the wood slice. Waited for it to dry before moving on to adding the layers of Mod Podge. Depending on how quickly things dry and how many and heavy the coats are layered on, that step might finish in a day or two or maybe even several days will be needed.
Without a pre-drilled hole to hang the wood slices from, I found that ribbon tied and glued to the back worked fine. Finally, I used washi paper to cover over the backside with the exposed ribbon and Mod Podged that too.
My biggest challenge was that my local 100 Yen Shop kept running out of wood slices and ribbons that were suitable for the project!