Years ago I picked up a bunch of pretty blue toilet bowl brushes for 99 cents apiece. My Mom pricked my bubble by saying "no one uses those anymore!"
So I sit with these pretty brushes...finally, after making cat cages, I noticed the cats keep rubbing on the wire. I found one of my blue wonders and put it to use by cable tie-ing it to their cage.
See the whole maze of cat walk on my other instructable. If they need encouragement, add some catnip to the bristles.
Finalist in the
Unusual Uses: Bathroom Challenge