Here is another interactive toy that keeps your kitties busy. The Catit Senses 2.0 allows for 100+ layouts. It has an extra long track but keeps the ball inside as your kitties play with it. It stimulates your cats to chase or play with the ball.
The Catit Senses 2.0 Super Circuit comes with 2 straight parts, 4 curved parts, and 4 curved wavy parts. It also comes with a circuit cat ball. You can find out more about it here.