Students usually look forward to this particular group of events because it provides an opportunity to learn about the inner-workings of the UN. In addition, they get some experiencing in actually debating current event issues with fellow uni students from all over the world.
One of the MUNs that I’ve been fortunate enough to participate in is BIMUN – Belgrade Model United Nations. A well-organized Model United Nations that's open to participants up to 29 years – once you're a university student. Although it does carry a fee, it has proven to be an exceptional experience that has had consistently positive reviews on the European MUN circuit.
Check out details about BIMUN here: https://www.facebook.com/BIMUN.UNASerbia/