Journal box

Dear little one,

A journal box is a part of a train that helps keep things moving smoothly. It's like a little metal container that holds oil to help the train's wheels turn properly.

The wheels need to be lubricated so they don't get too hot or break down, and that's where the journal box comes in. It's kind of like putting lotion on your hands to keep them soft and smooth.

The journal box is located right where the train's axles connect to the wheels, so it's really important that it's working properly. It also has a cover to protect the oil from dirt and dust.

So basically, just remember that a journal box is a part of a train that helps keep things moving smoothly by providing oil to the wheels.