A toy nursing bottle for use with a doll is provided with a reciprocating nipple that actuates a bellows to create air bubbles in a liquid within the bottle. The toy nursing bottle includes a transparent bottle having a body portion and a neck portion, and a volume of liquid, preferably a colored liquid, in the body portion of the bottle. A resiliently compressible bellows is supported within the neck portion of the bottle. The bellows includes an outlet valve in the bottom wall for injecting air bubbles into the liquid in the bottle when the bottle is inverted and the bellows is compressed, and an inlet valve in the bottom wall for drawing air back into the bellows when the bellows is released. An elongated air inlet tube is connected to the inlet valve and extends upwardly into an air space above the volume of liquid in the bottle so that the air is drawn into the bellows from the air space. A nipple shaped actuator mounted within a cap received on the neck of the bottle has an inner end in engagement with a top wall of the bellows and an outer end extending through the cap for engagement with the mouth of a toy doll. The actuator is reciprocatable axially inwardly for compressing the bellows and injecting air into the liquid within the bottle.

A water toy is provided with play members in a game body which is at least partially filled with air. The water toy has a fountain generating mechanism for generating a stream of liquid in the air of the game body to propel the play members through the air. The play members may be caught by receiving elements.

An amusement device which includes a transparent tank filled with a liquid medium such as water. Contained within the tank is a plurality of uniform diameter, positive and negative buoyant spheres. Disposed inside the tank is a downward directional tubal system and an upward directional tubal system which are used to move the spheres in opposite directions of their buoyancies. Located beneath the floor of the tank is an air pump which feeds air into the tubal systems to create currents which forcibly move the spheres through the tubes. Also disposed in the tank are downward and upward directional tracks which route the spheres to their respective staging areas, depending upon their buoyancies. For example, positive buoyant spheres travel upward in the liquid medium along the underside of the upward directional track while the negative buoyant spheres travel downward in the liquid medium along the top side of the downward directional track. The positive buoyant spheres move through the downward directional tubal system and then along the bottom surface of the track to a staging area. From there, they are again drawn into the downward directional tubal system and the cycle repeats. The negative buoyant spheres travel in the opposite direction.

The present invention, a submarine-type liquid mixer provides a mixing device that contains a gas-trapping component in the shape of a cap or umbrella with an open bottom, which is centered upon, and slides up and down along a vertical pole-like structure within a vessel containing liquid. When gas is formed naturally in the vessel and is caught under the opening of the cap-shaped component, or is directly pumped into the same, it displaces the liquid volume under the cap-shaped component to the extent that the cap-shaped component, which is also generally the mixing device, has the buoyancy to rise to the top of the vessel. The gas is then released through valving installed on top of the cap-shaped component, causing it to lose it's buoyancy and sink back to the bottom of the tank. This process then repeats itself, the up-and-down movement of the cap-shaped component mixing the liquid. The gas-trapping component may alternately be a mainly closed gas container. In this case, the gas may be introduced or withdrawn through a flexible hose.

A transparent vessel containing a fluid and a life-like full scale human brain inserted into the fluid is used for novelty purposes. The vessel is open on its top and sealed on its bottom, and is mounted on a base portion of the device. Air bubbles are produced from an air pump attached to the side of the base portion. A tube connected to the air pump and an outlet port is positioned inside of the vessel, immersed in the liquid to supply air. The transparent, water-tight brain vessel is lit from underneath by a lamp. To enhance an effect of a scientific fiction experiment, the novelty is placed on a stand and has one or more decorative perforated tubes attached for visual effect. The tank is preferably covered with a dome-shaped lid.