The Catit Senses 2.0 Play Circuit is the ultimate hunting toy for your cat. The product includes a straight track that allows compatibility with the wider, more stable Catit Senses 2.0 products. This update also results in an amazing new range of 100+ different layout possibilities! The Catit Senses 2.0 Play Circuit is level to the ground which is great for building speed, and is compatible with other Catit Senses 2.0 Circuits (43155W, 43156W), as well as the Catit Design Senses Circuits (50730, 50735, 50736). The Senses 2.0 Play Circuit includes 1 straight part, 2 curved parts with top opening, 2 curved parts with side opening, 2 end parts and 1 circuit ball. Thanks to the fresh, green style, it matches any home interior.