What is the 4-H Extravaganza? It is the Mason County 4-H alternative to county fair. This event will be held on Saturday, July 30 at the Shelton High School Student Union Building from 10am – 3pm. The 4-H Extravaganza will showcase learning, still life projects, record books, Public Presentations and 4-H pride with the community! Animal projects will hold qualifying events prior to July 30. This free event is open to the community!