Ours are indoor kitties, so I do havee some ideas.
-Wrapping paper works well, especially in this season
-Some foil, crinkleled up with a string tied to it, and dragged around is great fun.
- A empty film case with the top still on makes for hoursof play when you have a cat who likes batting things around. You can also put a hole in the bottom and tie a piece of string to it and pull it around for the cat.
- The traditional ball of yarn is great fun, especially when the person at the other end is trying to roll it up or untangle it.
- The inside of a toilet paper roll.
- Some fur (rabbit is best) tied to a piece of string and hung up somewhere so it dangles. If you are lucky enough to get a whole pelt then you may see the cats jump for it and dangle madly in midair
- A smallish bouncy ball, like a pingpong ball, is fun.
thats all I can think of at the moment

hope it helps
