Air Swimmers ($40) are helium filled mylar balloons in the shape of fish that you can control via a remote control. The controller takes 3 AAA batteries and the flying fish utilizes one. According to the inventor, they can stay afloat for up to 2 weeks on a single refill. Two models were recently announced; a flying shark and a clown fish. Because Air Swimmers are very light weight, they are only recommended for indoor use. The fun flying fish will be available in July 2011.