Children’s right to be heard and to be taken seriously is a crucial and also visionary provision of the Convention on the Rights of the Child. It has helped to see childhood through a new lens and gain a renewed understanding of citizenship and democracy. Differently from before, children can no longer be perceived as passive recipients of care and protection, or accidental beneficiaries of policy decisions; they cannot be envisaged as not yet persons or adults in the making. As the international community commemorates the twentieth anniversary of the Convention and takes stock of the experience gained over the past several years of its implementation, children’s participation in decision-making stands as a critical dimension of this significant process of change.