The Purrfect Action Balls Twin Set have have various toy inserts that spin when the ball is in motion.  Toy inserts vary.

Cat toys are exciting, great fun and help stimulate your cat's natural senses and encourage them to play. Keeps them out of mischief and entertained whilst they chase, juggle, carry and paw them around your home. They are particularly beneficial for indoor cats that require both mental and physical stimulation to keep them fit and healthy.
 
Please Note: This toy is not indestructible, all play must be supervised. Replace toy once worn.
 
Pop one in with your furniture order to save on postage!