Manipulating play elements in liquid cell

Claim 1

A play cartridge in combination with a conventional optical projector or viewer having a slot normally intended to receive a slide, said cartridge being insertable into the slot to provide images on a screen which are manipulatable by the player, said projector including a light source and a projecting lens which produces an inverted image of the cartridge interposed between the source and lens, said cartridge comprising: A. a liquid-filled cell formed of transparent material and having parallel front and rear walls through which light from said source is transmitted, said cell being mounted within a rectangular frame; B. opaque play elements disposed in said cell formed by objects whose specific gravity is less than that of the liquid whereby the objects normally rise to the top of the cell; and C. an external actuator supported on the frame and operable by a player to animate said play elements by propelling them toward the bottom of the cell, the play activity being viewable on said screen, where the objects, because of the inversion, appear to be moving upon actuation from the bottom to the top of the cell, and D. fixed targets disposed in said cell to capture said propelled play elements.