| 摘要 |
A first plastic film transparency (10) is formed to include an image (14). A second plastic film transparency (12) is formed to include a complementary image (16). The transparencies,;l0, 12) are positioned side-by-side. The first transparency (10) is formed to include a circle of circumferentially spaced apart incisions (18) in it. The second transparency (12) includes film portions (20) that project through the incisions (18) and connect the transparencies (10, 12) together for at least some rotation, one relative to the other. One transparency (10, 12) can be rotated relative to the other to bring the images (14, 16) into a predetermined relationship, each to the other, so that the two images (14, 16) when viewed together will provide a predetermined combined image.
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