Bamboo Pet Fat Cat springy worms catnip toy is designed with cat psychology in mind (we understand the kitty brain), they are built to bounce, baby. Spring technology for cat psychology. Kitties go all a-twitter for the irresistible bounce of springy worms. Plus we have thrown in a bit of famous high-test Zoom-Around-The-Room organic catnip to get things hopping. Includes 2 toys per pack.