clockwork Excellent interactive explanation of how mechanical watches work Rob Beschizza

joysticks 3D printing a joystick to control an Xbox game controller Gareth Branwyn

bird songs 1890s mechanical device sounds exactly like a bird singing Andrea James

auto mechanics Watch this mechanic fix a customers' "broken" turn signal that, um, isn't really broken David Pescovitz

skipping stones Watch Skippa the rock-skipping robot get optimized Andrea James

bike Watch how this chain-free bike operates Andrea James

mechanics Watch these mesmerizing mechanisms Mark Frauenfelder

engines Watch this gorgeous two-valve Stirling engine in action Andrea James

mechanics Watch Australian bush mechanics get a wrecked car rolling Rob Beschizza

windmills 1000-year old windmills still in use Rob Beschizza

engines Amazing working paper model of a V6 engine David Pescovitz