Mandysmom, the boards she is using is that corrugated plastic that is used to make the political, for sale, yard sale and other signs out of. I have seen other people use the card board for comic book storage. You can find both on line. I use heavy weight cardboard for mine. You can check with the political parties to see if they will let the signs go as the elections are now over. Also, look back through the questions and answers on this post to see if anyone has posted companies to buy from. I know the boards are sold in larger sheets that you can cut at home.