Tuesday: Sister Helen Prejean, the outspoken opponent of the death penalty who wrote "Dead Man Walking: An Eyewitness Account of the Death Penalty in the United States," will speak at 7 p.m. in Rockwell Hall, Buffalo State College.
Bass virtuoso Billy Sheehan, who first made his mark here in the 1970s with Talas, brings his current trio, Niacin, to the Tralf, Theater Place, 622 Main St., for an 8 p.m. show.
Wednesday: A new exhibit, "Big Feats for the Littlest Hands," opens today in Explore & More, the children's museum at 300 Gleed Ave., East Aurora. It features separate exploration areas for babies who are sitting, crawling and "cruising," and another for toddlers.
Thursday: The 25th annual Festival of Trees will kick off at 5:30 p.m. with the lighting of its large outdoor tree in the courtyard outside the Children's Hospital neonatal intensive care unit on Hodge Street. Admission is free.
Friday: Canadian-born Celtic fiddler Natalie McMaster plays Buffalo State College's Rockwell Hall auditorium at 8 p.m.
Saturday: "The Language of Flowers" is the theme of the Amherst Museum Victorian Dance Society's fourth annual ball, at 6 p.m. in the Buffalo Niagara Marriott, 1340 Millersport Highway, Amherst. Music for dancing will be played by a social orchestra made up of members of the Amherst Symphony Orchestra. Period dress is encouraged, but not required. Reservations are limited to 150. For information, call 634-2919.