Join the Academy’s weeklong celebration of International Migratory Bird Day (May 11). Play the Migration Game, use a field guide to ID birds, and more! Earn a special certificate by completing several of the interactive self-guided activities in the Naturalist Center and the Early Explorers Cove. Free with Academy admission. Naturalist Center hours: 11am-4pm Mon-Fri and 10am-5pm Sat-Sun. Early Explorers Cove hours: 10am-5pm daily. Please note: The Early Explorers Cove is an activity area for children ages 5 and under and their adult friends.