This chapter examines some theoretical and practical problems in global children's rights advocacy. It begins with a discussion of the novelty of children's rights and the problem of identifying the moral agent of children's rights. It then considers the tensions between the universalism of human rights advocacy and the relativism of development advocacy. It shows that children's rights research is influenced by social constructivism, which highlights the history of childhood and childhood norms. Early social constructivist approaches identified the concept of childhood underpinning the Convention on the Rights of the Child as a Western construction based on Western experiences and its exclusion of the experience of childhood in developing countries. The chapter proceeds by looking at a case study involving attempts to eradicate corporal punishment of children globally. It suggests that there are social and political problems with attempting to globalize childhood norms without globalizing material development.