We’ve all seen the grade school science experiment where sticking a couple of electrodes into a potato produces enough current to power a small light bulb. But engineer Marek Baczynski took that experiment several steps further, building what could be the world’s first autonomous potato—and the ultimate housepet.
A single potato doesn’t generate a lot of electricity, but if you collect that slow trickle into a capacitor—a sort of battery—you get enough of a charge to power a pair of electric motors. After sitting motionless for a quarter of an hour, Marek’s upgraded potato, which he named Pontus, was able to drive in a quick short burst for just over three inches, or a top speed of around 24 feet per day. Slow, but your cat probably moves even less from sunup to sundown.