Planet Weekend Picks April 27-29

Pi-Fight performs at the 2011 Communiversity after party. The band will perform again from 5-7 Saturday on Hinds Plaza.

Friday, April 27

Trinity Rummage Sale Fashion Preview – Calling all early birds! Shop the designer clothing departments for men and women tonight for the best selection of blouses, skirts, pants, dresses, blazers, suits, coats, party attire, handbags and belts. Also linens, books and more. First come, first served. 6:30-9 p.m. $10 admission.

Science Writers Dava Sobel and Diane Ackerman in Conversation – As part of the Princeton University public lecture series, science writers Dava Sobel and Diane Ackerman interview each other about the challenges inherent in their most recent works. Sobel is the author of ‘A More Perfect Heaven,’ ‘Longitude,’  and ‘Galileo’s Daughter’. Ackerman is the author of ‘A Natural History of the Senses, ‘The Zookeeper’s Wife,’ and ‘Dawn Light’.  McCosh 50, 7 p.m., free.

Spelling Bee, Princeton Public Library – Students in grades 4 to 8 compete for prizes,  7 p.m.

Folk Dance with Princeton Folk Dance – Beginners welcome, lesson followed by dance. No partner needed! At the Suzanne Patterson Center, 45 Stockton Street. 8 p.m. Admission $5.

Princeton University Orchestra Stuart B. Mindlin Memorial Concert – Performance features Stravinsky’s `The Rite of Spring’ and three scenes from ‘Wozzeck’ by Alban Berg. Michael Pratt conducts. Richardson Auditorium, 8 p.m. . Tickets $15. (also performed Saturday night)

Barn Swallow Presentation, Mercer County Park Commission – Barn swallows will arrive after a 3,000 mile flight from their wintering grounds. County naturalist Jenn Rogers presents a program focusing on the swallow’s migration, nest building, and feeding. Children are invited to attend a kids only program at the same time.  Howell Farm, 70 Woodens Land, Lambertville, 7:30-9 p.m., free.

Saturday, April 28

42nd Annual Trinity Spring Rummage Sale – Get ready to rummage with Trinity’s popular spring rummage sale, which will offer clothes, art, silver, jewelry, china, collectibles, dishes, toys, books and more. 9a.m.-3p.m., free admission.

Communiversity Festival of the Arts –  The town and gown unite for their annual spring street arts fair and celebration of the arts with live entertainment, exhibits, artists, crafters, music, dance performances, and food. Noon- 5 p.m., rain or shine. Popular local band Pi-Fight tops off the day with an “after party” performance in Hinds Plaza from 5-7 p.m. Visit the Arts Council of Princeton website for complete schedule of events. Free.

Central Jersey Chess Tournament, New Jersey Chess – Open to kindergarten to eighth graders of all levels. All players receive a medal or trophy. All Saints Church, 16 All Saints Road, Princeton, 2-6 p.m. Register on site, $40.

Jazz Competition, Princeton High School Studio Band – Nine band compete for New Jersey Association for Jazz Education finals. Benefit for the band program’s travel, musical education, and materials. PHS, 151 Moore Street,  5-10 p.m., tickets $9.

Suzanne Vega and Duncan Sheik, McCarter Theatre – Duncan Sheik, composer of Broadway musical, ‘Spring Awakening and singer/songwriter Suzanne Vega performs in Matthews Theatre, 8 p.m. Tickets $30 and up.,

Sunday, April 29

Learn to Bike Class for Adults, West Windsor Bicycle and Pedestrian Alliance – For adults and mature teens. The class uses a pedal-free balance technique. Bring a bike and a helmet. You must be able to rest your feet flat on the ground while sitting on the bicycle seat. Vaughn Drive parking lot, West Windsor. Helmets available for $10.

Season of Remembrance, Princeton Jewish Center – ‘Memory at Work: A Jewish Perspective on Building the 9/11 Memorial Museum’ presented by Adina Langer, who has worked for more than five years in curatorial and public affairs capacities for the National 9/11 Memorial and Museum. She will share her stories of experiences with artifacts, images, oral histories, and written tributes by artists, survivors, and family members of victims. Langer is a graduate of West Windsor-Plainsboro High School, Class of 2002. Bagel brunch. 435 Nassau St., 11 a.m. Free.

Barn Swallow Celebration, Mercer County Park Commission – Barn swallows will arrive after a 3,000 mile flight from their wintering grounds, Howell Farm, 70 Woodens Land, Lambertville, 1-3 p.m., free.

Friends of Princeton Open Space Annual Meeting – `Using Shade to Restore the Forest Floor’ talk by Emile DeVito, manager of science and stewardship for the New Jersey Conservation Foundation. At Mountain Lakes House, 57 Mountain Avenue, 3 p.m.