Introduction Have you ever wondered how ancient people could lift very heavy objects, such as large stones, to build pyramids? A lever is a simple machine that can help people do just this. It can ...

Levers can help to lift heavy loads, as well as make things go up and down. Levers can be found in many everyday items. For example, a door handle, a pair of scissors, a can opener and even a ...

Levers are used all over the place in our everyday life. But have you ever wondered just exactly how they work? Grab your favorite budding scientist and tackle this fun project — and before you know ...