A woman on my freecycle network was giving away 40 45 x 25 old fashioned wood pane windows, which I happily took off of her hands...I'm going to try to nail them together (with wood and other supporting materials) to make a small greenhouse!! Woo woo!! I posted on the greenhouse forum to see if this is "possible" but I really don't see why it wouldn't work. I love freecycle!!!