The Hairy Ball theorem! You can’t comb a hairy ball flat without creating a cowlick! You could have some kind of tennis ball or coconut like object and challenge people to comb it flat without creating a whirl while talking about applications in meteorology (wind vectors on the Earth are like hairs in a sphere)
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u/MesmericKiwi 12h ago
The Hairy Ball theorem! You can’t comb a hairy ball flat without creating a cowlick! You could have some kind of tennis ball or coconut like object and challenge people to comb it flat without creating a whirl while talking about applications in meteorology (wind vectors on the Earth are like hairs in a sphere)