If you are a serious do-it-yourselfer, you too can make a shredder to grind those Amazon boxes into superior bedding. I took this video (https://www.youtube.com/watch?v=B9JHbRpwbwQ) and made a safer version. The slot is now too small for fingers and ALL dangerous points are covered. I am still working out the details to provide clear instructions to put together this shredder that speeds through a pile of cardboard. Let me know if you are interested.