Kaleidoscope
From Tardis Wiki, the free Doctor Who reference
A kaleidoscope was a toy which allowed the user to create and view symmetrical, colourful patterns.
On 26 July 2202, the Eighth Doctor spent all day looking at a kaleidoscope. (PROSE: Seeing I [+]Loading...["Seeing I (novel)"])
In Vienna, the Eighth Doctor used a kaleidoscope to expose a bartender as a Bacchanite. (PROSE: The Sorrows of Vienna [+]Loading...["The Sorrows of Vienna (short story)"])
Danny Dillard was gifted a kaleidoscope by his Nan, and enjoyed playing with it until his dad stamped on it in a drunken rage. (PROSE: Kaleidoscope [+]Loading...["Kaleidoscope (short story)"])