The Earth Extravaganza, a free, family-friendly celebration of the environment, will be held Monday, April 23, from 1 to 7 p.m. at the Ag & Natural Resources Center, 670 Old Harrisburg Road, Gettysburg. Hosted by the Adams County Conservation District and Penn State Extension’s Master Watershed Steward Program, the event will feature interactive displays, educational workshops, and activities for all ages.