I used to make cat tunnels, and dog toys. You could buy a package of it at a craft store like Micheals. They packed up and left town, now I have no idea where one would buy it.
I think it is Sunchips, has a new Eco Freindly bag. That thing is NOISY and crinkles a lot. If I were going to use a bag it would be that one! Kids were playing with it, even with the chips still inside.