Film: The Atlanta Film Festival presents “Pip & Zastrow: An American Friendship” and a Q&A with the director, 7 p.m., Martin Luther King Jr. National Historic Site, 450 Auburn Ave. N.E., Atlanta. FREE.

For kids: Target Free Second Tuesdays, 1-7 p.m., Imagine It! The Children’s Museum of Atlanta, Atlanta. FREE.

For kids: Allatoona Ally 2010 Coloring Book author autograph party, 3:30 p.m., Cobb Central Library, Marietta. FREE, RSVP requested.

Music: The Georgia Boy Choir Festival, including a performance by the American Boy Choir, 7 p.m., Peachtree Road United Methodist Church, Atlanta. FREE.

Stage: “Mamma Mia!” opens, 8 p.m., Fox Theatre, Atlanta.

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