I've always liked Michael Giacchino, composer of Pixar movies and Lost; now, I love him. In a brief speech, he articulated nearly everything I know about how to encourage creativity:
When I was nine and I asked my dad, "Can I have your movie camera? That old, wind-up 8 millimeter camera that was in your drawer?" And he goes, "Sure, take it." And I took it and I started making movies with it and I started being as creative as I could, and never once in my life did my parents ever say, "What you're doing is a waste of time." Never. And I grew up, I had teachers, I had colleagues, I had people that I worked with all through my life who always told me what you're doing is not a waste of time. So that was normal to me that it was OK to do that. I know there are kids out there that don't have that support system so if you're out there and you're listening, listen to me: If you want to be creative, get out there and do it. It's not a waste of time. Do it. OK? Thank you.