Pen, Paint, and Pretzels, the umbrella organization for student-run performing arts groups at Tufts University, presents the first of three performances of Shakespeare’s “Julius Caesar.” Directed by Abby Donaghue and Katelyn Young; stage managed by Adeline Grimmett. Open admission; no tickets required. The show will be repeated at 2 and 8 p.m. on Sunday, April 2.