worth hearing • Scott Simon interviews the authors, Hal and Conn Iggulden The Dangerous Book for Boys. Which contains some basic ingredients to get boys off the computer and into the backyard. Boys can learn how to build a go-cart, make an electromagnet, grow a crystal and make secret ink. The idea, the authors say, is that courage, risk-taking and a sense of adventure is what being a kid is all about. Hhmmm . . . sounds like a good book for my niece.