Set the kaleidoscope in such a way that your field of vision is evenly lit. Slowly move the device around its axis. Observe the resulting image transformations. Note the symmetry of the image.
How does it work
The set of mirrors inside the kaleidoscope causes the image of the objects placed inside to multiply. The mirrors’ configuration is also responsible for the symmetry of the image.
Images created by multiple mirror reflections were known to the ancient Greeks. In the modern times, the first kaleidoscope assembled from two mirrors was invented by a British physicist Sir David Brewster in 1816. It initially served as a science tool only to become a popular toy later on.