I wanted to try and think of something easy that Matthew and I could make together. We bought a big sheet of dark green card and hunted out some biscuit cutters to print with. First we used a big snowflake with white paint (Matthew did all of the printing for that one), and then when that was dry we used a small Christmas tree with green paint (he lost interest with that one... plus maybe I was being a bit too controlling. Ahem).
I cut the sheet into squares and glued it onto white card. They're not quite how I pictured them, but not a bad joint effort. Who knows what added sophistication next year might bring?