I actually just made a simple ball yesterday (just learning basic amigurumi stuff recently), accidentally dropped it in the ground, and my cat immediately attacked it. Based on his frantic batting and chasing it around the room, I’d say a simple ball makes a great cat toy! 😅

Wonder if you could use something like a thin stocking/tight material (like you would to put those weighted pellets inside a stuffed object), fill it with catnip, and put it in the center of the ball along with the other stuffing? (I might have to try this out one day soon now that I think of it!!)