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self powered

Green Pass: The Award-Winning Turnstile That Powers Itself

What can a hundred thousand Chinese people do when entering the subway? Produce power, of course! A team called “VIVA design”, from the Guangdong University of Technology in China, have retrofitted those turnstiles at the subway entrances to produce electricity whenever someone passes through.

DIY: How to Make a Wave Powered Boat

You may use small wood boards, or toy boats “borrowed” from your kids. Or as well you may teach your little ones how to build a free energy device.