Mo Willems, author and creator of the #1 New York Times bestselling, Caldecott Honor award-winning Elephant & Piggie and Pigeon picture books, is at it again with Elephant & Piggie’s “We Are In A Play!”. Support American Theatre: a just and thriving theatre ecology begins with information for all. Please join us in this mission by making a donation to our publisher, Theatre Communications Group. When you support American Theatre magazine and TCG, you support a long legacy of quality nonprofit arts journalism. Click here to make…