Lego Stores are offering a Free Lego Mini-Build on Tuesday, May 6th, 2014 beginning at 5PM at participating stores. One free per child. Event is open to children ages 6 to 14 only. See store for more details.
Looks like they are making a dragon this time around.
Since this is a while supplies last event, I highly recommend you call ahead to be sure your store is participating and has stock left before you head over.