Made to stimulate your cat's sense of sight, sound and touch, the Catit Design Senses Speed Circuit takes playtime to a higher level. It has a number of innovative features for thrilling excitement, including ramps for ball acceleration, elevated tracks that add a fast-paced exciting roller coaster element, and a motion-activated ball that lights up when it moves, allowing cool day or nighttime play. Catit Design Senses products used individually or combined together to create a complete Sensory Activity Center for your feline.