These Window Curtains Use Sand When you see it you will ask yourself why you didn’t invent it and why was this not commercialized before. Facebook Prev Article Next Article Inventions Checkout these cool gadgets... Related Posts Stretchable electronics that quadruple in length Rodin Coil – Quantum Interaction & Perpetual Energy Car Cup Holder Re-Invented Artificial Muscles from MIT Research Tear-Inspired Material Can Be Tuned to Repel or Attract Water Flavor Changing Food – Cookie