Abstract: An animal habitat includes an exercise wheel simulating the drive wheel on a steam-powered locomotive; protuberances on the exercise wheel strike a trip wire which swings a locomotive bell and an idler disc connects the exercise wheel to simulate locomotive running wheels which may be suitably decorated to produce an effect pleasing to the eye when the running wheels are rotated by the exercise wheel which, in turn, may be rotated by an animal housed in the habitat.

Abstract: Platform is provided with an opening in which a hollow cylindrical member is mounted. The cylindrical member includes an opening for admitting a small animal to the platform and carries a post on which a dome is rotatably mounted with its encompassing sidewall coacting with the platform to cage the animal. The dome carries food compartments depending to a position closely adjacent the platform. An opening in the bottom of each food compartment permits food to be dropped onto the platform beneath the compartment in a position such that the animal must push against the compartment to rotate the dome and expose the food.

Abstract: Revolvable, hollow spheroid has a pair of tubes communicating with its interior 180.degree. apart. The free ends of the tubes may be closed with caps to prevent the animal from escaping. A housing mount rotatably mounts the spheroid and serves as an access opening for an animal of the rodent type. The animal may rotate the spheroid by running on its inner surface or by entering one of the tubes. The housing mount includes a fitting for connecting the spheroid to a tube communicating with an animal cage.

Abstract: Edible material is dispersed in a pad of nesting material. The pad may be placed in a container housing an animal, such as a bird or a rodent, so that the animal may discover food when it pulls tufts of nesting material from the pad.