For your little goblin, it’s a sackful of treats. But for some kids, Halloween can be anything but sweet. That’s where Emma Rose Shapiro comes in. After rooting through her closet and noticing a surplus of fairy wings, the 12-year-old decided to hold a city-wide costume drive. She’s forfeited her beloved Hannah Montana duds, so follow her lead with a dig through the dress-up box. Outfits should be new or gently used — just remember, a princess would be nothing without her crown, so try to donate complete sets. Shapiro enlisted the Greater Norristown Police Athletic League to distribute the goods to lil’ pumpkins in need. And she has her sights set on collecting 1,000 costumes, so she needs your help. Or she won’t stand a ghost of a chance. Drive ends October 10. For drop-off locations and more information, call 610-639-9460 or go to thehalloweenhelpers.com. Photo: Courtesy of The Halloween Helpers DO River City Festival What: Tie their laces for the kid-friendly RiverCity Run, then learn about the Leni Lenape Indians, pounce on the moon bounce, and see live animals from the Philadelphia Zoo. Why: Go with the flow. When: Sat. Registration opens at 8 a.m.; race, 10 a.m.; festival, noon-5 p.m. Where: Penn Treaty Park, 1199 N. Delaware Ave. Register online at runtheday.com. SIGN UP Maternal Wellness Center What: October sessions offer helpful info (topics range from choosing a caregiver to LGBT parenting), plus new mommy-and-baby playgroups. Why: Rock the cradle. When: You can use a helping hand. Where: 606 Carpenter Ln. Register in advance for playgroups at 215-713-2666 or online at maternalwellness.org. SHIVER Terror Behind the Walls Family Night What: Creatures will back down for brave souls (ages 7-12) when they say “monster be good” on this slightly less frightening tour of the haunted prison. Why: Scare tactics. When: Thru Nov. 1. Times vary. Where: Eastern State Penitentiary, 2027 Fairmount Ave. (215-236-2986). Tickets at 800-653-8000 or ticketmaster.com.