Emily Nussbaum on the renaissance in children's programming.

This week in the magazine, Emily Nussbaum writes about "Miffy and Friends," "Ni Hao, Kai-Lan," "Phineas and Ferb," and other children's television shows. Here Nussbaum talks with Blake Eskin about the boom in creative new programming for children, the differences between childish and adult tastes, and the trouble with having a television policy.