Upcoming events include ballet, riverbank cleanup, Earth Day fair, birding, music and more
FRIDAY • “Jennie Brooks: A Nature Lover in Lawrence,” 7-8 p.m., Watkins Museum of History, 1047 Massachusetts St. In-person and livestream; see watkinsmuseum.org. • Lawrence Ballet Theatre: “The Firebird,” 7 p.m., Lawrence Arts Center, 940 New Hampshire St …