If there’s one thing audiences love in sci-fi, it’s a cute robot companion that follows the heroes around. If you want one of your own, starting with this build from [mircemk] could be just the ticket ...

If you're old enough to remember Radio Shack (and shame on you if you're not!), you probably remember those old coin-eating robot piggybanks. You'd put a coin in its hand and it would “eat” it.