1 Diary of a Wimpy Kid of OZ February 15, 2010 by Ruby820 In Dairy of a Wimpy Kid Gregory and his class do a play called The Wizard of OZ in Gregory's School. Read more > Retrieved from "http://oz.wikia.com/wiki/User_blog:Ruby820" Ad blocker interference detected! Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.