Each week Pat and Eric answer a couple questions so you don't get stumped when your kid says "But Daddy Why..."
http://www.blogtalkradio.com/butdaddywhy
episode 3: One Horn and No Corn - The Unicorn Story
Pat and Eric were asked “Why are they called unicorns? Where does the corn come into play? Shouldn’t they be called unihorns?” They answer this question and tell the story of how unicorns came to be.