yes you can use cardboard or newspaper or even shredded paper but it must be kept moist and they will love it.I hope you have air holes also?stingray94;2424968; said:I do have the bin covered with a lid, it's one of those rubbermaid containers that you buy at walmart that come with a lid. Somebody told me that one way to prevent them from escaping is to put a damp piece of cardboard over the peat moss so I guess I'm going to have to see how that ends up working. Thanks for all the help.