Children can surprise us when we least expect it. Children have such an innocent view of the world that adults corrupt. Children can see the raw formula where as adults are bias on what information they believe due learned behavior in their lifetime. Most Adults in the political area and other area's have their own agenda or someone Else's agenda they are trying to push through children do not.
I think that anyone human, whether they be old, or young can contribute to world peace and helping to unite the world. Children have an amazing ability to see the world through different, more fascinating eyes. They may have some creative solution no one has ever thought of because we are tied to our adult views.