Motors are machines that exist all around us. They power cars and motorcycles. To make one, you need a wire, a battery and a magnet, like shown below. You spiral the wire around the battery and connect it to the battery and the magnet. They work because as the electric current runs through the wire, a magnetic field is created. It collides with the magnetic field of the magnet and because they repel each other, the wire starts moving around the battery. They convert electric energy to mechanical energy. A car uses this same procedure using wheels at the sides. When you step on the pedal, the battery starts using more fuel to move the wheels.