All invited to watch or participate in the release of tagged monarch butterflies. Also, games and other activities to learn about their life cycle and the center’s role as a way station for migrating monarchs. 1–4 p.m. 1831 Traver. $6 (members, $5; babies under 2, free) in advance at discoverscienceandnature.org/monarch & at the door. (734) 997–1553.