Ice Cream and Fireflies. Mass Audubon Broadmoor Wildlife Sanctuary. 280 Eliot St. (Rt. 16). Natick. 7:30 p.m. to 9:00 p.m. What's better than ice cream on a summer night? Why not add a little fun outdoor exploration? Join the adventure as we look for flashing fireflies, listen for the songs of frogs and katydids and use a "bat detector" to find our local bats. Adult: $12M, $14NM. Child: $7M, $9NM. (508) 655-2296. www.massaudubon.org