Abstract: A magnetic display system is disclosed, including a first screen having a front surface for contacting a magnetic display device and a second screen having a rear surface for contacting a magnetic device controller. The first screen and the second screen define therebetween a scenery receiving space for receiving at least one scenery sheet. The scenery sheet may be advanced and/or replaced while magnetic display devices are displayed on the system, without having to hold the displayed devices in place.

Abstract: A magnetic display system is disclosed, including a first screen having a front surface for contacting a magnetic display device and a second screen having a rear surface for contacting a magnetic device controller. The first screen and the second screen define therebetween a scenery receiving space for receiving at least one scenery sheet. The scenery sheet may be advanced and/or replaced while magnetic display devices are displayed on the system, without having to hold the displayed devices in place.

Abstract: A magnetic display system is disclosed, including a first screen having a front surface for contacting a magnetic display device and a second screen having a rear surface for contacting a magnetic device controller. The first screen and the second screen define therebetween a scenery receiving space for receiving at least one scenery sheet. The scenery sheet may be advanced and/or replaced while magnetic display devices are displayed on the system, without having to hold the displayed devices in place.

Abstract: The invention comprises a generally rectangular plate and a mounting system so that the plate can be mounted adjacent to and parallel to one wall of a fish containing enclosure, such as an aquarium. An elongated nozzle and water conduit are attached to one edge of the plate. In use, the nozzle directs a curtain of water transversely across the plate within the volume defined by the plate and enclosure wall. Fish are generally attracted to this faster moving water and preferentially move into the volume between the plate and enclosure wall. In an aquarium, this places them in a close up position where they can be easily watched by an observer.

Abstract: The invention is a viewing device suitable as a novelty item or for such other purposes as a teaching or navigational aid. It comprises a compass and in its preferred form has a 360.degree. panoramic photograph wrapped into drum form and affixed to the compass. A viewing device is also provided, so that when the person observing the photograph is facing a given compass direction, he will see essentially the same view that would be seen by another observer facing in the same compass direction at the point at which the photograph was taken. An essential part of the invention is the way the photograph is represented. If the viewing device is arranged to see the outside surface of the drum-shaped photograph, the photograph must be a mirror-image representation. If the viewing means is arranged to see the inside surface of the drum-shaped photograph, a normal representation must be used. In other versions of the invention, the photographs need not have edge-to-edge continuity.