Catit Senses 2.0 Circuit The ultimate combination of the Senses 2.0 Play and Wave Circuits, with special peek-a-boo track design that stimulates cats to chase the ball 24 longer than the old Super Roller Circuit and enables 100+ layouts! Full Senses 2.0 and backwards compatibility Includes a swirl patterned ball with the optimal weight for play. Easy to clean and assemble Activate your cats senses with the new Senses 2.0! This product activates TOUCH SIGHT HEARING