Jennifer Garner gives some Arkansas kids a pre-Halloween scare

Jennifer Garner is back at work on her moonlighting gig as an advocate

for Save the Children and early childhood education. Last week, the “Peppermint” star

 stopped by the ARcare Center for Education and Wellness in Augusta, Arkansas, where she used her mom-knowledge to tease a slew of kids, Halloween style. A video posted to Jennifer’s Instagram shows the actress warning the little ones, “whatever you do, don’t follow me!” before, as expected, they chase her across the grass as she walks away. In the clip, Jen has the last laugh, turning around to give them all a ghostly and well received scream when they’re least expecting it. Jennifer’s been working with Save the Children, supports education, health and other services for underserved kids, since 2009.