Look, that USB-powered fish tank
was fine during your teenage years of irresponsibility, but it's really about time you started acting your age. Of course, we're not suggesting you actually work harder -- just smarter, is all. The DIY Automatic Fish Feeder is an exceptionally cheap, easy and almost life-changing creation that will never, ever forget to keep your fishes well fed and well lit. By attaching a makeshift pill bottle dispenser to a timer, Baha Tanju was able to create an automatic feeder that barely requires any attention. We know fish have a way of forgetting everything they ever knew every three seconds or so, but they'll love you three seconds at a time for never leaving 'em hungry.