Cool! The idea of this one was indeed flawless, I believe sand is made of silicone which is one of the most abundant natural resources in the planet and secondly is the witty idea of using sun as another source of energy placing it in deserted land was dashing. I love the idea, great hunt! I will give this one a score of 5 out of 5.
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Wow, thank you very much for your perfect score! Indeed, this is a very innovative project. :)