A bored beastie is a bad beastie - baseboards, cords, even furniture can suffer.
Pulling and tugging are important for small animals. Rabbits will tug on branches and bark, keeping their teeth in good shape. Giving your animal the chance to do "natural" behaviors makes life better for everyone!
The materials vary depending upon seasonal availability, but may include: Akebia, blackberry stem, apple twigs, cattail, lambs quarter stems, sunroot or sunflower stems.
To see more about where these materials were grown, and how the toy was made, look at this!