Mo Willems, #1 New York Times bestselling, award-winning author-illustrator, invites kids to take center stage in this one-of-a-kind theatrical event Get your backstage pass to the world premiere performance of THE DAY ELEPHANT & PIGGIE MET Readers discover how to be a set builder, prop maker, costume designer, playwright . . . and star of the show in this 144-page, ACTion-packed ACT-ivity book from Mo Willems and pals. Featuring...