Homemade cardboard scratching post!
awesome for walkways, porches and patios--around the fire pit!
IKEA Hackers: A long one for cat lovers
The solution for ugly stinky business
Tres jolie structure de bibliothèque
Corner Shelf Made of Plywood.
Creative cat trees that look like trees
Friskies® DIY Homemade Cat Toys: "Knotty Spider" awesome toys for kitty. My son and I have three of these toys already.
Cat perch - this is clever, put a little bed up there for them, gives them a chance to get away!