Walter Isaacson, author of Einstein: His Life and Universe, discusses creativity and its place in our society. Free. Bryn Mawr Presbyterian Church, 625 Montgomery Ave., Bryn Mawr. 7:30 p.m. 610-525-2821.
Lower Merion High School graduate Nicholas Giordano introduces and discusses his leading role in Parting Words with director Stan Schofield. $8.75; $6 seniors. Bryn Mawr Film Institute, 824 W. Lancaster Ave., Bryn Mawr. 7 p.m. www.brynmawrfilm.org; 610-527-9898.
The seasonal change is in full effect at Ithan Elementary School's "Spring Thing" celebration. Enjoy fun and food during this fund-raiser. Free admission. 695 Clyde Rd., Bryn Mawr. 10 a.m. to 2 p.m. 610-520-2437.
The Marple Newtown Players wrap up their run of Frederick Knott's Wait Until Dark. $12; $10 seniors. Performances at the Gauntlett Community Center, West Chester Pike and Media Line Road, Newtown Square. 8 p.m. Thursday and Friday. www.playersstage.org; 610-353-9181.