At the most basic level, a kaleidoscope is made of two or more mirrors or reflective surfaces positioned at an angle to each other, usually forming a V-shape or a triangle. A tubeorcase -- often looking like a spyglass -- is the body surrounding the mirror assembly. A collection of objects is positioned at one end of the mirrors, and there's an eyehole at the other end.
What you see when you look through that eyehole will never be exactly the same twice! While the container holding the objects is usually as large as -- or larger than -- the kaleidoscope tube, only the portion of the objects that fall within the space of the triangle within the object holder is reflected.
Hope you like my answer
