I cut the circles with my Sizzix circles die and then cut the apertures out again with a smaller circle. They're not entirely central, but I don't think that matters too much. The message was done with a Dymo labeller and the background paper is Basic Grey (Color me Silly, I think). I enjoyed doing this, it's a bit different.
So, happy anniversary again, Daring Cardmakers, and thank you for inspiring me!