In 1954, some grown-ups got together and made a special paper for people who want to travel to other countries. This paper is called a convention travel document. It helps people who don't have a passport to travel to other countries for a short time, like going on vacation or visiting family. You can use it instead of a passport if your country and the country you want to visit both agree to use it. The paper has lots of information about you, like your name, where you're from, and where you're going. It's like a special note that tells other people you're allowed to travel to their country.