I moved my laundry room to another room in the house last year and have a dryer vent to the outside now that is not used. The old laundry room is patiently awaiting it's turn for demolition to become part of our new and improved kitchen, and is basically used for storage now. When I moved the dryer, I just covered the interior part of the duct with ducttape to keep out the weather, and never got around to capping the duct on the outside. This weekend I noticed a very small brownish wren type bird has built a nest in the old vent. From the outside I can see 4 eggs at least.... Now my question.... I would LOVE to carefully cut away the duct tape and cover the vent with something clear so we can watch the babies grow from the inside of the house. We can close the door and turn off the light in the old laundry room and she probably would not even know we are there watching her. It'd be like National Geographic! Heck, I might even put the web cam in there if it gets boring out in the peacock pen...but I digress.... Anyway, Glass is too hard to cut. Saran wrap is too thin and other easily cutable plastic is too opaque or wouldn't work. Any suggestions for what i can use to cut a 4" round shape, and then duct tape it to the dryer vent so we can watch this mamma bird?? Is there something thinner than plexi that could be cut with an exacto knife??