Skull and bones is a special secret society that exists at a university called Yale. It's like a club that only certain people can be a part of, and nobody knows exactly what they do there. The logo for the club is a picture of a skull and crossbones, and that's why it's called Skull and Bones.
To become a member of Skull and Bones, you have to be invited by someone who is already in the club. The people who are in the club are usually very wealthy and important, and they don't talk about what happens inside the club. Some people think that members of the club might be trying to take over the world or do other secret things, but nobody knows for sure.
There is a special building called "The Tomb" where Skull and Bones meets. It has lots of weird symbols and decorations, like skulls, bones, and pictures of people who were important to the club in the past. Nobody knows what happens inside The Tomb, but it's probably very secretive and mysterious.
In conclusion, Skull and Bones is a secret society for very important and wealthy people at Yale University. Nobody knows exactly what happens inside the club, but there is a special building called The Tomb where members meet and lots of mysterious symbols and decorations.