Designer Chetan Sorab's Matchlight is a clever lighting concept that lets you arrange a pile of matchsticks however you want—and as long as the sticks are touching each other, they'll all light up, despite the fact that only one of the 16 "matches" has a power cord. Here's how:

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Each individual light stick has a magnetized polypropylene body, so you can stand them up as straight as a line of soldiers, as well as having them strewn higgledy-piggledy. And how do you get the current to pass through all the lights? Simple—by induction, baby. Yanko]