Moss Hollow Small Animal Playground. Moss Hollow Playground is a great addition to any pet corner! Made with natural. non-toxic materials, this buildable play structure is safe for tiny friends such as mice, small hamsters and gerbils. This playground features a ramp, staircase, platforms, tunnel, and more! Easy assemble! No tools required Features a ramp, staircase, platforms, tunnel, and more! Crafted from natural materials and non-toxic Suitable for mice, small hamsters and gerbils! Size (Approximately): 14.5"W x 7.1"D X 9.4"H (37cm x 18cm x 24cm)