Dr. Elizabeth Yuko is a bioethicist and adjunct professor of ethics at Fordham University. She has written for The New York Times, The Washington Post, The Atlantic, Rolling Stone, CNN & Playboy.

Lego is the clay of the modern world, the stuff of creativity. You can shape it, unshape it, make worlds and smash them up to be replaced by new ideas. It's a perpetual-motion machine of kids' ...