A simple cheap toy that my cats go mad over.
Step 1: Materials
A stanley knife
A tennis ball
Catnip or cat mint
Step 2: Kill the ball...
Slash holes in the ball like in the picture. Make one slit with the knife then cut across then up with the scissors, or just do it all with the knife.
Step 3: Stuffing
Stuff the ball full of catnip / catmint and rub some on the outside.
(i got mine from my garden)
Step 4: Test Drive
Here are some pictures of my cat destroying it.