Here's a concept fish owners (or fish who are owned by children) wish was real: a robotic fish feeder. A unit like the Fifer would probably serve a pond better than a fish tank as it's designed to deliver the good stuff to as many fish as possible. Sound like a simple job? It's actually deceptively complex. Not only will the Fifer feeding robot emit sounds that'll attract the fish to it, but it'll gauge how many fish there are near it, and how much to dispense out of its "feeding delivery circle." After that, it'll scurry off to the next feeding area using water jets.