For example, often lawnmowers have two switches in series with each other so that both switches need to be pressed before the mower will turn on. The power ring circuit is also a parallel circuit.

If there are no branches then it's a series circuit. If there are branches it's a parallel circuit. In a television series, you get several episodes, one after the other. A series circuit is similar.

However, this is a great time to look at the difference between series and parallel circuits. A Simple Circuit ... have the other lights on? In the physics world, we call this "the magic of ...