This easy-to-build walking reindeer can be constructed with only a bow motor, battery, wires, and a few other parts.

Lauren Graves is an educator-turned-editor specializing in personal finance content. She seeks to make complicated topics easier to understand and less intimidating to the average reader with accurate ...

The theory behind hydropower is very simple: water obeys gravity and imparts the gained kinetic energy onto a turbine, which subsequently drives a generator.  The devil here is, of course, in all ...