Overstuffed bags lined the hallways yesterday at the offices of Partnership with Children, a nonprofit whose mission is to develop the emotional, social, and cognitive skills of at-risk children. The bags were filled with hundreds of toys destined for children who participate in the organization’s Open Hearts Open Hands program, which brings social workers into New York City public schools.

“In the schools we serve, 90% of the children are at the poverty line. They’re bombarded by social and economic pressure. They end up at school numb. We work to free them up cognitively,” said the clinical director of the organization, Barbara Cavallo, who founded Open Hearts Open Hands.

As early as October, boxes of toys started to arrive at the office of Partnership with Children, turning the office into a Santa’s workshop.

“Over the years, we’ve learned to keep all the like toys together. So all the Barbies here, all the books there, all the Beanie Babies over here,” said Ms. Cavallo as she gestured around her office.

In November, social workers in the program submitted lists of gift recipients. Each entry started with a parent’s name, followed by the names of children, with preferences like “loves to paint” or “likes sports, especially football and chess.”

Yesterday, volunteers from 100 Women in Hedge Funds wrapped all the presents.

Soft toys were the most difficult to wrap (“You have to make an envelope,” advised Amy DiDario). Books were the easiest. Many wrappers stayed for hours, fueled by baskets of freshly popped popcorn.

This morning, social workers transport the bags of toys to their schools and hand them over to parents. The children aren’t meant to know the gifts come from Partnership with Children.

“We believe the gifts are a child’s right. It’s not charity,” Ms. Cavallo said.