Imagine you are playing with a ball, but this ball is really special. It's a fancy ball that shows the whole world and it's called the Globe. Now, let's say you really like this ball and want to make sure you take good care of it. You might use your other hand to hold a stick, just like a pirate has with a sword. This stick is like a king's scepter and helps you to carry the world ball.
Now, let's imagine you are a king or queen and you need to show people that you are in charge. You might use a really special stick called a scepter to show everyone who is boss. But, there is a fancier stick called a globus cruciger, which is a scepter with a ball on top. This fancy ball on top is a globe of the world and it shows everyone that the king or queen holds power over the world. The king or queen can hold this scepter with the globe on top while walking around and people will see it and know that they are in charge.
So, a globus cruciger is basically a fancy stick that a king or queen holds to show that they have power over the world. The ball on top is a globe of the world and it's really special because it shows the whole world.