This indoor bike can knit a scarf in five minutes: Cyclo-Knitter

To stave off the cold and boredom of waiting at the train station, Dutch design student George Barratt-Jones made a pedal-powered knitting machine that can whip up a neck scarf in five minutes flat. He writes, "[It] gets you warm by moving, you are making something while you wait and in the end you are left with a free scarf! That you can decide to keep yourself or give to someone who needs it more."

Check out his design notes and photos here:https://imgur.com/gallery/LBofgnr

(Colossal)