The classic Kong toy resembles a snowman-like structure of three balls pushed together. They also come in several variations for dogs of different ages and sizes. Made of rubber, they are hollow in the middle, and can be stuffed with treats[4] or frozen to provide longer distraction for dogs. The classic Kong product is also offered in different rubber types, tailing to dogs of different chewing capabilities and different age. In addition to the typical snowman-like Kongs, Kong also offers a line of dental chews, balls, pull toys (such as the Kong Wubba and the Kong Tugger Knots), Frisbees, a dog binky, floating toys, squeakers, and various interactive toys and accessories. For cats, Kong also has a line of toys including a cat version of their "Wubba", as well as scratching boards, catnip, and other chew toys.