The Ouija board ( /ˈwiːdʒə/ WEE-jə) also known as a spirit board or talking board, is a flat board marked with the letters of the alphabet, the numbers 0-9, the words "yes", "no", "hello" and "goodbye" and various symbols and graphics. It is a registered trademark of Hasbro Inc., which markets and distributes the Ouija Board as part of its line of board games. It uses a planchette (small heart-shaped piece of wood) or movable indicator to indicate the spirit's message by spelling it out on the board during a séance. Participants place their fingers on the planchette and it is moved about the board to spell out words. It has become a trademark that is often used generically to refer to any talking board.

Following its commercial introduction by businessman Elijah Bond on July 1, 1890, the Ouija board was regarded as a harmless parlor game unrelated to the occult until American Spiritualist Pearl Curran popularized its use as a divining tool during World War I.

Mainstream religions and some occultists have associated use of the Ouija board with the threat of demonic possession and some have cautioned their followers not to use Ouija boards.

Penn & Teller (Penn Jillette and Teller) are American illusionists and entertainers who have performed together since the late 1970s, and are known for their numerous stage and television shows. Their current Las Vegas show is an amalgam of illusion and comedy. Penn Jillette is a raconteur; Teller generally does not speak while performing, although his voice can occasionally be heard during their performance. They specialize in gory tricks, exposing frauds, and performing clever pranks. More recently they have become associated with atheism, scientific skepticism, and libertarianism, particularly through their television show Penn & Teller: Bullshit!.

Penn Jillette and Teller were introduced to one another by Weir Chrisimer, and they performed their first show together at the Minnesota Renaissance Festival on 19 August 1975. From the late 1970s through 1981, Penn, Teller, and Chrisimer performed as a trio called "The Asparagus Valley Cultural Society" which played in San Francisco at the Phoenix Theater. This act was sillier and less "edgy" than today's Penn & Teller act.^{[citation needed]} Chrisimer helped to develop some bits that continued, most notably Teller's "Shadows" trick, which involves a single red rose.