Cricket: As explained to foreign visitors

You have two sides out in the field, one in and one out.

Each man that is in the side that's in goes out until he is out.

And when he is out he comes in and the next man goes in until he is out.

When they are all out, the side that's out comes in, and the side that's been in goes out, and tries to get those coming in out.

Sometimes you get players who are still in and not out.

When both sides have been in and out, including the not outs, then that is the end of the game.