Welllllllllllll ~ I don't buy anything specifically FOR them, but as far as they are concerned, EVERYTHING belongs to them. The bows and ribbons are for them, the ornaments are for them, the tree is just one big cat tower as far as they are concerned. (We wrap fishing line around the tree and anchor it to the wall so that it doesn't crash down 300 times a day). Here are a couple of typical Christmas scenes at our house:

and