The Ouija Board (Allegedly) Named Itself
A strong argument can be made that an Ouija board is the best party game/way to unintentionally call a demon ever created. These were available for purchase as early as 1891, and because of their frequent appearances in pop culture and other media, they have recently grown in popularity. They were a must-have Christmas item in 2014. That's very astounding, given that half the cast of every movie that uses them perishes.
Aside from demons and spirits, the Ouija board's name is the most peculiar feature. You don't come across that word very frequently, and the internet won't be much help either. That's because the Ouija board is where the word "Ouija" originated.
According to legend, Helen Peters, a psychic, was utilising a spirit board in 1890. The board responded with "Ouija" when she inquired what it should be called. The planchette on the board shifted to the words "thank you" when she inquired as to what that meant. If the legend is true, the Ouija board is possibly the only inanimate item in history to have given itself a name.
