I don’t know if it’s because Fall is here, but I’m in a Do-It-Yourself mood. Here’s an excellent tutorial on how to build your own sisal scratching post for your feline friends. There are lots of really useful tips and clear instructions. (Update: The creator of this tutorial suggested googling for 3/8 Brazilian sisal rope to find good sisal for your post.)
You can also apply much of the advice, such as recommended base size for a post, to making a cat tree—check out these other posts on how to build your own full cat tree and how to build this monster cat tree. Your kitties will love you and you’ll love how much money you can save!