Reduced neurotoxicity in transgenic mice overexpressing human copper-zinc-superoxide dismutase

A toy milkable animal figure such as a cow which includes a chamber for liquid, an inlet to the chamber, and an outlet from the chamber. The chamber defines a flexible udder having at least one teat with an openable aperture. The aperture comprises the outlet. The udder may be manually manipulated by a child-user as by squeezing to cause release of the liquid through the aperture. The animal figure may include a pump which may be manually operable, as for example, by pumping the tail, and the inlet to the chamber may be connected by an inlet tube to the mouth of the animal which may be immersable in a source of water. The pump may include an overflow system which permits water to be pumped through a return tube in the figure and back to the source of water when the chamber is filled. The chamber may be openable for cleaning and also to permit introduction into the chamber of a dye or pigment which will color water in the chamber white so that it has the appearance of milk when it is discharged through the udder aperture. In this way, a child playing with the animal figure can observe the cow drinking water and ostensibly convert the water into milk which can be released from the udder.