For those of you who expressed interest in my balls, I present to you the latest incarnation of my cat ball toy!
The pattern that came with my 'learn to knit' kit resulted in a ball toy that is more appropriately called a kitten ball. Sure, they were popular among my 12 lbs. and 17 lbs. neutered males, but my cats aren't kitties, they're CATS, and big, butch ones at that, so some alteration to the pattern was clearly in order.
I started out adding an additional row of knit 1, invisible increase, repeat and a resulting additional row of knit 2 together, repeat later in the pattern. The end product was a significantly larger ball, approximately the size of an egg and was very popular with my boys.