An everyday activity that could be turned into a function would be knitting.
Although I haven't had a go at knitting since I was a child, I can see how the repetition of the stitches and rows could be translated into a function. I actually found an article about the relationship between knitting and computer science as I was investigating this idea online.
#cserApps1 pdfs.semanticscholar.org/d9d8/80c874ac08213e14ab61c97aee3dbd6928fa.pdf pdfs.semanticscholar.org
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