A sleeper car is basically a special type of train car in which you can sleep during a long train ride. It's like having your own little bedroom on the train!
When you get on the train, you can go to your sleeper car and find a bed that is already made up just for you. It's kind of like a big bunk bed, with a mattress, sheets, blankets, and pillows. You can climb up to your bed and get all cozy and comfy for the night.
Some sleeper cars also have private bathrooms that you can use. And some even have tiny little sinks and showers, so you can freshen up before you go to bed or when you wake up in the morning.
Sleeping on a train can be really fun! You can watch the scenery go by out the window, and you might even fall asleep to the gentle rocking of the train. And in the morning, when you wake up, you'll already be at your destination, so you can start your day right away!