Kaytee Play 'n Chew Medium Cubby Nest. The Kaytee Play 'n Chew Cubby Nest is made from Natural sisal material and includes attached wooden chews and a hanging sisal ball for playing. The wood and sisal material are excellent chewing materials and promote good dental health in small animals. Simply place the nest in your pet's cage and watch as they chew, play or curl up for a much needed nap. Handmade of natural woven sisal The wood and sisal material are excellent chewing materials and promote good dental health in small animals. Cubby Nests provide a safe and secure resting spot for small animals Approximate size is 7-1/2-inch long, 6-1/2inches wide, and 6-inch high For guinea pigs, pet rats and other small animals.