Catit Senses 2.0 Play Circuit For CatsCatit Senses 2. 0 Play Circuit For Cats The Play Circuit is level to the ground which is great for building speed. 10" 25cm longer Create open layouts. To keep your cat interested, you need to change their toy set up often. The Senses 2. 0 Circuits can be built and rebuilt into different shapes around the house. Surprise your cat with a new layout every few days to keep the experience fresh and exciting!