Perpetual Motion is a Patience game which has the objective of discarding playing cards from the tableau. The name relates to the time-consuming process of the game. It is also called Idiot's Delight or Narcotic. The name Perpetual Motion is also the alternative name of another solitaire game called Rondo or Eight-Day Clock. The name Idiot's Delight is also used to refer to two other unrelated solitaire games, namely Aces Up and King Albert.