Cat senses are unique; they see and hear sights and sounds that are beyond our understanding, and with their sense of taste, touch and smell they experience the world in ways we can only imagine. Our line of Catit Design Senses products was developed with your cat in mind, designed to appeal to all of your cat's senses. Each Catit Design Senses product can be purchased individually, or be purchased together to create a complete Sensory Activity Center for your pet. Incorporating sight, sound and touch, the Catit Design Senses Speed Circuit moves speed to a higher level with its accelerating coaster ramps. The elevated tracks add a fast-paced exciting roller coaster element while the motion activated illuminated ball allows for day or nighttime play. Features include: - Motion-activated, illuminated ball: allows for day or nighttime play. - Elevated peek-a-boo tracks: adds fast paced roller coaster element while allowing cat to see, chase and swat the ball - Multiple layout possibilites; and additional tracks can be purchased separately to grow the set-up