For the international ATC group to which I belong we had the task of creating something transparent or see through for August. I created a very simple ATC punching square holes in 3.5 x 2.5 cards, adding tissue paper birds over the hole and then creating BIRD on t-shirts. The BIRDs are faux collaged to make them stiff. They will arrive soon to the four corners of the world. In our group someone lives New Zealand, the UK, Germany, Israel, Sweden, and two in the US. We send them out bi-monthly. Hold the bird up to a light or a window and the card changes appearance.