Just a novelty item, a musical shredder. Plays a tune as you shred your documents. If you were to build in songs, obvious choices include Queen’s “Another One Bites the Dust” and Dick Dale’s “Misirlou.” Alternatively, you could drop in a little MP3 player with a CF slot or similar.

Not only would it add a little bit of fun to shredding documents, it would also help to cover the hideous whining noise that most shredders make.