The present invention comprises two or more rotatable three-dimensional bodies and a linkage between the bodies. By means of the linkage, the rotation of a first body causes a second body to rotate. In at least one of the rotational positions of the two or more bodies, the shapes of the bodies are designed to create a shaped cavity between a first body and a second body. The shaped cavity may be a tunnel, or the shaped cavity may be a recess or niche. As the at least two bodies are rotated, the shaped cavity may appear or disappear or may change shape, position, or orientation as the bodies are rotated.

A vent balloon, including an inflatable body operatively attached to a molded plastic base on a proximal side, wherein the inflatable body is inflated by a mechanism of an air vent or a fan operatively attached to the molded plastic base, and including a scent mechanism operatively attached to the molded plastic base for dispersing scent in a room that relates to a design on the inflatable body. A method of using a vent balloon by flowing air through an inflatable body of a vent balloon through a molded plastic base, wherein the air comes from a source of an air vent or a fan operatively attached to the molded plastic base, inflating the inflatable body, and flowing air over at least one scent mechanism operatively attached to the molded plastic base that relates to a design on the inflatable body and releasing scent into the air.

A vent balloon, including an inflatable body operatively attached to a molded plastic base on a proximal side, wherein the inflatable body is inflated by a mechanism of an air vent or a fan operatively attached to the molded plastic base, and including a scent mechanism operatively attached to the molded plastic base for dispersing scent in a room that relates to a design on the inflatable body. A method of using a vent balloon by flowing air through an inflatable body of a vent balloon through a molded plastic base, wherein the air comes from a source of an air vent or a fan operatively attached to the molded plastic base, inflating the inflatable body, and flowing air over at least one scent mechanism operatively attached to the molded plastic base that relates to a design on the inflatable body and releasing scent into the air.

A kite assembly and method of flying a kite from a wind source such as a fan, generally indoors, incorporating multiple tethers to provide generally stable, controlled and sustainable flight. The kite assembly provides for multiple tethers set to appropriate lengths and tethered to appropriate places on the kite and the wind source. Multiple tethers help balance the kite and prevent the kite from flying out of the lifting zone of the airflow created by the wind source, when the wind source is stationary, rotated, oscillating or being moved around a room. The tethers generally diverge from the kite and as a result the kite flying characteristics or direction of flight can be controlled in ways not possible with traditionally tethered kites, which typically have single or converging tethers. Multiple kites may be flown from one fan, or connected to one another to form unique flying combinations.

A kite assembly and method of flying a kite from a wind source such as a fan, generally indoors, incorporating multiple tethers to provide generally stable, controlled and sustainable flight. The kite assembly provides for multiple tethers set to appropriate lengths and tethered to appropriate places on the kite and the wind source. Multiple tethers help balance the kite and prevent the kite from flying out of the lifting zone of the airflow created by the wind source, when the wind source is stationary, rotated, oscillating or being moved around a room. The tethers generally diverge from the kite and as a result the kite flying characteristics or direction of flight can be controlled in ways not possible with traditionally tethered kites, which typically have single or converging tethers. Multiple kites may be flown from one fan, or connected to one another to form unique flying combinations.

[Problem] To provide a system that can control a floating state of a floating object within a production space. [Solution] This production system 100 includes a plurality of air discharge devices 10. The plurality of air discharge devices 10 are configured to generate a clockwise or counterclockwise air flow when viewed in a plan view, within a production space surrounded by air discharge ports 12 of the devices. It is possible to cause an object F to float within the production space by means of the air flow generated by the plurality of air discharge devices 10.

[Problem] To provide a system that can control a floating state of a floating object within a production space. [Solution] This production system 100 includes a plurality of air discharge devices 10. The plurality of air discharge devices 10 are configured to generate a clockwise or counterclockwise air flow when viewed in a plan view, within a production space surrounded by air discharge ports 12 of the devices. It is possible to cause an object F to float within the production space by means of the air flow generated by the plurality of air discharge devices 10.

A vent balloon, including an inflatable body operatively attached to a molded plastic base on a proximal side, wherein the inflatable body is inflated by a mechanism of an air vent or a fan operatively attached to the molded plastic base, and including a scent mechanism operatively attached to the molded plastic base for dispersing scent in a room that relates to a design on the inflatable body. A method of using a vent balloon by flowing air through an inflatable body of a vent balloon through a molded plastic base, wherein the air comes from a source of an air vent or a fan operatively attached to the molded plastic base, inflating the inflatable body, and flowing air over at least one scent mechanism operatively attached to the molded plastic base that relates to a design on the inflatable body and releasing scent into the air.

A magnetic spinning toy that includes: a top magnetic stem; a bottom magnetic stem; a cylindrical core; a rod extending from each end of the cylindrical core creating a top rod and a bottom rod, where the top magnetic stem extends from the top rod and bottom magnetic stem extends from the bottom rod; a plurality of rotating wings mounted on the cylindrical core; and a connector for each rotating wing, wherein the connector includes a pivoting connection to each wing. The top and bottom magnetic stem may include a copper tube with embedded magnets. Preferably each pivoting connection includes a notch and a rivet.

A magnetic spinning toy that includes: a top magnetic stem; a bottom magnetic stem; a cylindrical core; a rod extending from each end of the cylindrical core creating a top rod and a bottom rod, where the top magnetic stem extends from the top rod and bottom magnetic stem extends from the bottom rod; a plurality of rotating wings mounted on the cylindrical core; and a connector for each rotating wing, wherein the connector includes a pivoting connection to each wing. The top and bottom magnetic stem may include a copper tube with embedded magnets. Preferably each pivoting connection includes a notch and a rivet.