Chibitronics cards

I said that I'd been having fun with my Chibitronics lights, and would save a few cards to post together.
Since I just uploaded the last one I've made the other day on SCS, I can put them all in a post here now. At this stage I have started using two layers of fun foam and just cutting little holes in it for the battery and LED stickers. Next thing is to figure out how to make an opening in the battery housing, so that I could send cards overseas and just tell the recipient to put their own battery in.  I've also seen some done with a pull tab to break/complete the circuit, and I want to try one of those soon.