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In many areas in Africa children survive with only one liter water a day and some of them even die because lack of water. On the other hand, there is no education resource in some area in Africa.
Why don’t we make something cheap(for example a mineral water bottle) an interesting tools to help them? We make the bottom of the mineral bottle into a convex lens. And the bottle caps is a concave lens, simple optical principle makes the empty a telescope and a microscope. Small tools can help them to understand the diversity of the world in the very great degree.
Bergische Universität Wuppertal