Owen and I worked on this project over the course of a few days. We left the materials out at the table, and would sit down and work a while every so often.
It's a basic painted Mod Podge craft with recycled babyfood jars and scraps of tissue paper. We used two colors of orange and one color of green. We did the orange first, let it dry then turned it over and pasted on the green, and then the black faces. You get the most translucent glass-like look by applying a layer of Mod Podge over the top of it all as well.
We clipped them onto a string of white lights, and the give a brilliant orange glow.