The new play tracks feature a straight track element that makes them compatible with the wider and more stable bases of the Senses 2.0 products. This new element allows for even more versatile designs and can even be used together with the old blue play tracks. To keep your cat motivated, the setup of their toys should be changed regularly. The Senses 2.0 play tracks can be arranged in a variety of shapes throughout your home. Surprise your cat regularly with new designs to keep them literally on the ball!.