Here's a helium balloon with a twist: The Air Ray is modeled after a manta ray but instead of lazily plying its way through the ocean, it floats gracefully through the air. The guys at Festo, a company that specializes in factory automation but seems to have a lot of spare time for fun projects, created a beating wing drive for this lighter-than-air remote-controlled craft, using the "Fin Ray Effect" to make it fly like a sea creature. Better not try flying this outside with any winds blowing—you'll need lots of space in a swank Eurostyle atrium to pull this one off. [Festo]
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Don't care how, I want it now.