Container crane

Imagine a really big and strong robot arm that can pick up giant boxes full of toys, clothes, or food like the ones you see on big ships. That's what a container crane is, a machine that moves shipping containers, which are huge metal boxes that are used to transport goods all around the world.

But how does the crane work? Well, it's fixed to the ground and it has a long boom (that's the arm we talked about earlier) that can reach across the entire ship. There's also a trolley that moves along the length of the boom, and it has a hook that can grab onto a container.

When the crane operator wants to pick up a container, they use a control panel with buttons and levers that help them move the trolley and the boom. They carefully pick up the container and move it to where it needs to go, either on the ship or on the dock.

Container cranes are really important because they make it possible for us to receive and send goods to other countries. Without them, we wouldn't be able to enjoy all the cool things from around the world that we have today!