Infinitesimal Light Bulb
A light-bulb joke: one infinitesimal can change the bulb, just by a negligible amount.
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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/2015-01-01-infinitesimal-light-bulb/ (CC BY-NC 4.0)Transcript
"How many infinitesimals does it take to change a light bulb?"
"Just one, but it won't change very much."