We have our house listed for sale and I gathered a bunch of cardboard boxes for that and I've been cutting it down as needed and also use egg cartons too when they are empty. I would say it's fairly close to being equal parts give or take a little. I will definitely save leaves this fall we have plenty of them also my grandma shreds every piece of paper she gets so I'll ask her to save them for me. Paper would probably be a good addition to alternate wth cardboard. Thanks again!!