A pair of drive and idle pulleys are journalled from horizontally spaced apart elevated mounting structures and an elongated flexible tension member is trained about the pulleys. An elongated member extends between and is anchored relative to the mounting structures and a wheeled carriage is supported from the support member for rolling therealong. A crank is journalled from the carriage and a rotary friction drive member is journalled from the carriage and rollingly engaged with the support member for rotation relative to the carriage in response to its movement along the support member. One-way drive structure drivingly connects the drive member to the crank and an animal simulating structure is dependingly supported from the carriage and includes at least a first oscillatable body part simulating member. Connecting structure is connected between the crank and the body part simulating member for oscillation of the latter in response to rotation of the crank.
