Ethan discovers how baby floog come into the world, and coincidently finds his best friend.  To satisfy Milly's curiosity about Ziggy, the person her grandfather always talks about as his best friend, Lewis tells her all about Zigmin; "Ziggy" as Ethan refers to him.  It opens Milly up to stick around a bit more, to stay and listen as Grampa tells his stories.  She still has a hard time sitting still, but she's learning.