BIG DEAL EVENTS

Philadelphia Science Festival

Go behind the scenes for Explorer Sunday this weekend, featuring tours of labs, slabs (Laurel Hill Cemetery, for its botany and zoology), public gardens and even a skate park (Paine's Park, for the physics). Then consult the Science Festival calendar for the full slate of geekily awesome events all week. It wraps with the big Science Carnival on the Parkway next Saturday.

Explorer Sunday at Laurel Hill Cemetery, 3822 Ridge Ave., 9:30 a.m. & 2 p.m.; at Paine's Park, Schuylkill River Trail, 2 p.m., both free; various other times and locations, 215-448-1346, PhilaScienceFestival.org. Festival continues through May 3.

Filadelfia Latin American Film Festival

Daring movies interspersed with parties? Sign us up. The festival, now in its third year, screens four films Saturday at International House, including the Venezuelan drama "Pelo Malo" ("Bad Hair," 4:45 p.m.), a darling on the international film circuit. Then it hops to Chima (for a talk) and the Kimmel Center, where the thriller "Matar a un Hombre" ("To Kill a Man") precedes a cocktail party (cash bar).

Sunday, the action moves to University of the Arts, where the animated and kid-friendly "Anina" (10:30 a.m., recommended for ages 8 and up) opens a day of six screenings, with a wrap party at Tequilas Restaurant.

Various locations and times Saturday and Sunday, $7-$10 per film, all-access $175 VIP pass includes closing party, 718-751-6901, flaff.org.

Penn Relays

Track-and-field athletes compete for glory in USA vs. the World competition and other elite events. Meanwhile, stylish fans vie for fashionista bragging rights on the street scene. Saturday is the relays' last and best day.

Franklin Field, 235 S. 33rd St., 9 a.m.-6 p.m. Saturday, $42 & $52, 855-863-7849, thepennrelays.com.

QUIRKY BUT WORTHY

'The Wizard'

The wonderfully weird Cinedelphia Film Festival at PhilaMOCA closes with an extra-cool presentation of this '80s kiddie flick featuring Fred Savage ("The Wonder Years"). At 3 p.m. Sunday, before the screening, gamers compete in a re-creation of the movie's Nintendo World Championship. The top three advance to a final round after the film.

PhilaMOCA, 531 N. 12th St., "The Wizard" screens at 4:30 p.m. Sunday, $10, cinedelphiafilmfestival.com.

ON STAGE

Lewis Black

The lefty crank visits A.C. to spew his hilarious venom seaside.

Borgata, 1 Borgata Way, Atlantic City, 9 p.m. Saturday, $75 and $85, 866-900-4849, theborgata.com.

'Don Giovanni'

Opera Philadelphia stages Mozart's masterpiece with a cast that brims with locally trained talent.

Academy of Music, Broad and Locust streets, 2:30 p.m. Sunday, 7:30 p.m. Wednesday, 8 p.m. May 2, 2:30 p.m. May 4, $10-$247, 215-893-1999, kimmelcenter.org.

Mozart Celebration

Need more Mozart? The Philadelphia Orchestra's three-day Wolfgang blitz concludes Saturday, with teenage phenom Jan Lisiecki on piano.

Kimmel Center, Broad and Spruce streets, 8 p.m. Saturday, $53-$134, 215-893-1999, kimmelcenter.org.