A kaleidoscope is a toy in the shape of a tube with a small hole at one end. If you look through the hole and turn the other end of the tube, you can see a pattern of colours which changes as you turn the tube round.
N-SING
（色彩、成分等的）千變萬化，瞬息萬變
You can describe something that is made up of a lot of different and frequently changing colours or elements as a kaleidoscope.
例句
...the vivid kaleidoscope of colours displayed in the plumage of the peacock.孔雀羽毛的五彩繽紛...a kaleidoscope of different alliances, groupings and interests.結盟形式、黨派分立及利益關系的瞬息萬變