It's a long time till Christmas, but I saw this picture and had to pin it. I have these wooden stars, but do not know what to do with it and now I know!
Twig Stars-nice camping craft with kids
Schlicht und einfach (Diy Candles)
Use a sponge to soak up concrete mix in whatever shape you desire and let it harden into a hardened version of what you just cut out! Pavers or garden accents? (I would wear rubber gloves while dipping/soaking!) Worth a try.