I found these 2" metal discs on clearance at Joann's three years ago, because I know at least two Christmas ornament making seasons have gone by without using them. The first year I didn't even really try. Last year I did settle on the mail box design, but then I just couldn't bring myself to get started or commit to colors or something. This year, I finally sucked it up and it really wasn't too bad! After that, I was motivated to pick out and execute the cactus design fairly quickly, though I decided not to bother with a background. I glued felt circles on the back to finish them off.