This interview first aired April 23, 2015.

Make a mud pie. Find a four-leaf clover. They're two things you should do before you're 12, according to a new ad campaign in Colorado that's designed to get kids outside. On average, kids spend only about four to seven minutes of unstructured time outdoors. Paleontologist and TV host Scott Samson, formerly of the Denver Museum of Nature and Science, is on a similar mission, so we listened back to our conversation about his book, "How To Raise A Wild Child."

'Wild Child' Author: 7 Minutes Outside A Day Isn't Enough For Kids