Okay kiddo, so an outhouse is like a little house outside where people can go poop and pee. In the olden days, people didn't have indoor toilets like we do now, so they had to build a special little house for it.
The outhouse usually has a little hole in the ground where everything goes after you do your business. Sometimes people put straw or other things down there to make it not so smelly.
To get into the outhouse, there is usually a little door you can open and close so you can have some privacy while you go potty. Some outhouses have a little seat inside that you can sit on while you do your business.
It's important to be careful when using an outhouse so you don't accidentally fall in the hole or get stinky stuff on your clothes. Overall, an outhouse is a special little house that people used to go to the bathroom in when they didn't have indoor toilets.