Two dozen fourth graders from the Chapin School, all in regulation green vests that were dotted with badges, popped up from their chairs to recite the Pledge of Allegiance and the Girl Scout promise: “On my honor. ...”

The girls, members of Troop 3157 of the Junior Girl Scouts, had a snack — string cheese — and discussed the troop’s closing ceremony in June, where they would present the fruits of their “create your own business” projects. These include custom pillows, knitted iPod cases and baked goods for people with food allergies. Then it was on to the day’s outing: a trip to a local landmark.

“O.K.,” said the troop leader, Alyssa Moeder. “Who knows what Gracie Mansion is?”

“It’s where the mayors used to live,” answered a petite, curly-haired 10-year-old named Grace.

“But Mayor Bloomberg doesn’t live there,” she confided.

“Why?” asked Missy Rice, co-leader of the troop.