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魔术效果：
经典的近距离变色魔术:两片其貌不扬的黑色圆片，轻轻摩擦，竟幻变出彩虹般的美丽色彩！简单易学，效果超好！
适合人群：魔术初学者
视频演示：http://v.youku.com/v_show/id_XNjU0MjA2MDQ=.html
Rainbow Chips
Two chips with black interiors are shown on both sides. Magically they turn from black to red, yellow, blue and green one at a time. The change is very beautiful to look at. At the end you have two chips with red on one side, blue on the other and another chip with yellow on one side and green on the other.
