Useless Perpetual Devices A useless device is like a time loop and it just wants your attention. It is there just so that you get hypnotized. Facebook Prev Article Next Article Machinery Checkout these cool gadgets... Related Posts 3D Printers Are Now Printing Houses, Yes, Houses! Laser Rifle That Can Cut Through Metal High-speed Steady Flight in Confined Spaces for Tethered Quadrocopters Science and Post-It notes power this Rube Goldberg machine This Coffee Art Printer Puts Baristas To Shame 3D Cold Spray Repairs Any Metal Component to Its Former Glory