The Catstages 2-in-1 Spring Toy will elevate your cat's playtime to new heights and new cat track levels. Two toys in one, it's versatile to meet your picky cat's demands. This interactive cat toy offers multiple ways to play – bat n' swat fun on its own or elevate the challenge by adding it to select Catstages cat ball tracks such as the Tower of Tracks and Infinity Ball Track. The removable base allows for standalone play or seamlessly clicks the toy into Catstages cat tracks for leveled-up entertainment and the mental stimulation your cat craves. It's all about giving your cat the power to choose their adventure – because they're the boss. Teasing feathers and bells are strategically added to the spring toy to entice your cat to bat and swat. Plus a clear cover on the spring protects kitty claws from getting caught. The 2-in-1 Spring Toy cat toy and cat ball track topper is a revolution in feline entertainment: multiple ways to play, more bang for your buck, and the playtime challenge your cat has been asking for.