The last month has been so crazy for me. I didn't realize it had been so long since I logged on here. I have been busy with the Round up (plant swap) I co-host in Arlington. I also got to visit a native butterfly garden Josephine Keeney maintains at historical Fielder House, and then Dale Clarks butterfly farm all that same week.
Welcome to the forum Lance! I see Linda and Cat have answered your question and hopefully gotten you headed in the right direction. The fabric I use will breath fine; it is tricot like a swimsuit lining is made from. However you can purchase the castles with zippers that are about 1 foot square and have one clear side for viewing.
http://www.butterfly-release.c...
Whatever you do have fun…it is a great thing for the kids. When we have failures it just makes me want to try harder to bring them in earlier. I also feel when I have a live release that that is one I saved.