“Free” energy

I am always amazed when a new product comes along that solves a problem that I did not know even existed.  But after seeing the product, I realize that a very real issue has been addressed.  Here is one such example:  energy soccer ball.  After seeing the elegant design and reading about the issues it addresses and the novel manner in its approach, I am in awe of the overall approach.  This is neat engineering at its best.

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