Abstract: An apparatus has a container with a cavity containing a medium, and the container is sealed with a membrane that ruptures at a rupture pressure. A pressurizer pressurizes the cavity to at least the rupture pressure, and a projectile is disposed externally to the cavity during the pressurization. The projectile is propelled by the medium following rupture of the membrane. Preferred containers include pressurized cylinders, gun barrels, and ammunition cartridges, and preferred media include air, pressurized air and explosives, and a particularly preferred apparatus is a toy rocket launcher.

Abstract: A flying cylinder has a leading portion and a tail portion, wherein the leading portion is pointed to a degree such that the curf thickness is equal or less than 2 mm. In preferred flying toys, the tail potion has an average thickness of at least the thickness of the leading portion.

Abstract: A flying cylinder has a leading portion and a tail portion, wherein the leading portion is pointed to a degree such that the curf thickness is equal or less than 2 mm. In preferred flying toys, the tail portion has an average thickness of at least the thickness of the leading portion.

Abstract: A flying toy has a spiral-shaped tail to which a head portion is coupled to effect a wiggling flight pattern of the toy. In preferred embodiments, the spiral-shaped tail is fabricated from a material that maintains the spiral shape of the tail during flight, and has a configuration effective to impart a wiggling motion of the tail.

Abstract: An affordable plumbing device that uses a compressed gas and a burst disk having a relatively even surface of substantially uniform thickness to produce a sudden discharge of energy to forcibly act against any obstruction that may interfere with the proper function of a drain. The plumbing device has a cylindrical chamber for receiving the compressed gas and may generally take the shape of a plunger, which is flexible to use and is easy to store. A portion of the chamber forms a receiving chamber with the burst disk for harnessing and directing the energy of the compressed gas to clear the drain.