“e” Inc.’s new Environment Science Discovery & Action Museum opened in (114 16th Street, Room 1030, in the Charlestown Navy Yard, Charlestown) on January 30. It’s aimed at Grades 3-7, and its first exhibit is “Weather and Climate: Our Changing World.” About 50 classrooms and after-school groups have already signed up for 4-hour visits. Teachers and group leaders may schedule visits here ($3 per student + $10 per adult after the first 3 adults). Starting at the end of March, the museum will be open to the public on Saturdays, 10AM-4PM, with online signups for reservations opening in mid-March.