Saturday, March 23, is Pay-What-You-Want Day at the Connecticut Science Center. General admissions are free for all ages; donations will be accepted. (Regular admission fees range from $14 to $19.) Visitors can explore the center, including the new traveling exhibit, “An Exhibition of You,” from 10 a.m. to 5 p.m. (Movies and parking at regular rates.) Information: 860-SCIENCE or www.CTScienceCenter.org.