a toy that consists of a tube with two or more mirrors along its length and loose bits of colored material at one end, such that rotating the tube allows one to view endless reflected patterns through an eyepiece;
e.g. He won a kaleidoscope as a prize at the carnival.
(noun)
a diverse and constantly-changing selection or sequence of elements, such as a variable pattern or a series of actions or phases;
e.g. I saw a kaleidoscope of colors in the soap bubbles. The employees brought a kaleidoscope of experiences with them.