Inter-parliamentary institution

An inter-parliamentary institution is like a big club for people who work in different parliaments, which are like offices where people make laws. This club helps these people talk to each other and work together to make better laws for everyone. It's like when you have a group project at school and your teacher makes you work with other students to make something really cool. Only in this case, the students are important grown-ups who make important decisions that affect many people.