As the United Nations hosts its special session in September this year, children all over the world will, for the first time, add their voice to decide what issues are of prime importance for them. Unicef's new campaign - 'Say yes to children' - departs significantly from earlier sessions of policy-makers, government representatives and experts deciding on issues facing the children.Now, children from all countries and all age groups will get an oppportunity to actively vote on what they believe is important for them.