Simon simply cut a sliver off the bottom of the tree trunk (we always do anyway!) and we dried it out in the airing cupboard. Simon sanded it down, and using just a normal coloured pen, some string, ribbon and of course a button, I made our very "rustic" (ie pretty rubbish!) decoration. I hung it on the tree straight away, but after Christmas, Simon will varnish it to keep it shiny and lovely for years to come. I may attach a photo of the three of us on Christmas Day onto the reverse side as well.
So there you go. Simple, quick, cheap, not very good.....but made with lots of love for my beautiful lady, and something for us to pull out each year. No doubt Isabelle will look at it in 15 years and mock me greatly....