This eye catching product found its way into our offices last year along with one of the inventors, Nikhil Arora, and I loved the story. Inspired by hydroponics and the way plants clean nutrient rich water, the Aqua Farm is a fish tank that grows food at the same time, using the fish waste to feed the plants. It's a lovely biology lesson and a novel household item in one. Check it out.
(Image credits: Aqua Farm)