OECD

Okay, so the OECD is like a big club where grown-up countries who want to be better friends get together and talk about how to make things better for everybody.

It's like a really cool clubhouse where countries share their ideas and research about things like education, healthcare, the environment, and the economy. They try to help each other out by giving advice and opinions on how to improve things like job opportunities or how to make sure everybody has access to clean water.

The OECD also keeps track of important information and statistics about these things, so the countries can use that information to make better decisions. It's kind of like a big book with a lot of helpful information that people can use to do good things in the world.

So basically, the OECD is like a big club of countries that want to work together to make the world a better place, and they do this by talking to each other, sharing advice, and keeping track of information.