The Kaytee CritterTrail Hideout/Outhouse expands your pet's living space and promotes exploration, exercise and healthy habits. Add bedding and it becomes a cozy nesting space or add CritterLitter and it becomes an outhouse. The hinged lid opens for easy cleaning. Kaytee CritterTrail Fun-nel accessories are designed to stimulate your pet's natural instincts and encourage activity. The wide variety of accessories feature innovative designs and adapt to all tubular units. If you dream it, you can build it! Available in a selection of vibrant colors.