CatIt Senses 2.0 Wave Circuit Wavy track with special peek-a-boo cover 25 cm longer than the original Wave Circuit and enables 100 layouts! Full Senses 2.0 and backwards compatibility No need to track down stray balls around the house Easy to assemble and clean Made of BPA-Free Materials Each circuit consists of a ball that zips around a closed track in rollercoaster fashion. The special peek-a-boo cover stimulates cats to chase and swat the ball, which quickly adds up to hours of entertainment! 100 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! The Wave Circuit offers elevation for more diverse movements. The included circuit ball is the perfect size and weight to bat around. The Catit Senses 2.0 Fireball (sold separately) is a motion-activated light-up ball that flashes enticingly when your cat paws at it great for nightly play sessions!