My favourite invention is the waterwheel! I love the waterwheel because it is used for so many things: sawing, and hammering, mining, and even for grinding grain. They are really interesting because you do not have to do anything to power them, you just let the water flow through. Most of all they are pretty and they sound nice!
The water wheel was invented by the Greeks in 200BC and then adopted by the Romans. The Romans used it for pumping water out of the mines. The invention of the waterwheel meant that humans didn’t have to use their own strength to pump or grind and then they could do something else while it was running. That made work go faster and more work got done.