1. Laser Pointer
Laser pointers are an awesome way to give your cat some much-needed exercise. Cats will chase the lighted dot for as long as you're willing to play with it. Run it up walls to see how high they can jump, point it on your friend's foot and watch your cat attack! You can find these at any pet store or on sites like Amazon.com.
2. Mouse Chaser
These little contraptions are great for cats of all ages. There are different styles but the main idea is a toy (usually a mouse) on a track that when batted at, goes around the circle. Some may have a scratching-friendly center panel that you can sprinkle with catnip. You can find them at any pet store or online.
3. Catnip
Catnip is a fun treat for cats. It is essentially a "drug" for cats in that they react instantly to it and maintain an altered state of mind for up to two hours. Being a naturally occurring herb, catnip is completely safe for cats. Use of catnip should be limited to once or twice a week in a direct dose, and sparingly when applied as an extract to toys or other items. Cats will roll in it, attack it, and play with it with more intensity than cats would exhibit otherwise. The effect lasts for up to two hours.
4. Interactive Dangling Toys
These types of toys are great for when you don't have the time to sit and play with your kitties. Usually they come with a mounting attachment where you can either hang or mount one end to a wall or piece of furniture, leaving a toy or feather dangling down for your cat to bat at, attack, and bite! Use catnip extract on this type of toy to entice your cat to play with it on his own.