Möbius Currency
A spinning coin shaped like a Möbius strip, which has only one side, so a coin toss always lands on the same face.
Use this cartoon
Free for classrooms, worksheets, slides and other non-commercial use under CC BY-NC 4.0, with credit to Ben Orlin.
Cartoon by Ben Orlin, Math with Bad Drawings. https://cartoons.mathwithbaddrawings.com/2017-06-20-m-bius-currency/ (CC BY-NC 4.0)Transcript
[Coin, shaped like a Möbius strip, inscribed "IN TOPOLOGY WE TRUST" and "2017"]
[Caption] "The currency of Möbius gave a distinct advantage to whoever got to call the coin flip."