We use the computer print out paper...the type with the green and white 'lines'....we flip it over and its strong, white on the side used and extremely useful....normally it gets thrown away...

yeah, I think it's worth it....used to use aspen...not only did I have to pay for it, but I threw it away....it's like chopping a tree, crapping on it and tossing it.....

not saying it's BAD to use aspen, just not for me...

the snakes don't crinkle it up like newspaper so it lays nice, easy to change...and it's been used once before we use it.....

may not be ground breaking....but I use it as part of my "green"....