Head over here and "like' their Facebook page to request a coupon for a free Kind bar.
Heads up, they email you the coupon, so use an email address that you can access. :)
They say there are 100,000 to give away, and their entire page only has 62,000 likes at the time of this post, so there's a lot left, but you'll want to hurry!
(Thanks, NorCal Coupon Gal!)