The Heard Natural Science Museum & Wildlife Sanctuary, 1 Nature Place, McKinney, is celebrating its 50 year anniversary on Oct. 1 from 1-4 p.m. During this anniversary celebration, the museum will offer a butterfly talk, music, kid-friendly activities and refreshments. The museum serves more than 100,000 visitors annually and provides education, conservation and preservation in North Texas. 972-562-5566. www.heardmuseum.org