Children of all nationalities danced and sang traditional songs while the audience clapped wildly, often drowning out the music.
One young girl commented: "It was a great way to end such an inspiring and positive event."
The success of the Forum will be measured when two children address the United Nations Special Session on Children on Wednesday.
It's the first time ever children will have spoken at the UN in front of world leaders and they'll be asking these people in power to improve the lives of children worldwide.
Check CBBC Newsround Online later to read Press Pack reports from some of the children at the conference