kaleidoscope

In 1816 a Scottish inventor named David Brewster invented the kaleidoscope while studying physical science and the properties of light. While looking at objects at the end of two mirrors he realized that there could beautiful, colorful, different patterns to be formed. Sir David Brewster named the kaleidoscope after a Greek word meaning beautiful form watcher.

Kaleidoscopes became popular during the Victorian age as a parlor division. Sir David Brewster specialized in many light and optical advances and invented many lenses for lighthouses.

My opinion on kaleidoscopes is that they're not very entertaining. Maybe a couple centuries before they were more entertaining but with computers and phones the  kaleidoscopes become easily old.