Harrington made a special note to prepare for the end of the 90-day period and learned that Zoe had also been keeping track.
"She woke up that morning remembering it had been the 90 days," said her mother.
Video and a few photos were taken to commemorate the exchange.
"She was bright-eyed and excited," Harrington said. "As an officer, Zoe is the type of child who you want to interact with, you can tell that she really cares about the job we do."
When asked how, if at all, she would spend her money, Zoe said, "I would buy ice cream!"
But rather than keep the reward all to herself, Zoe altruistically plans to take her three best friends, Maggie, Charlotte, and Claire, to Friendly's Restaurant for an ice cream party that, hopefully, will be catered with her favorite frozen accoutrement: raspberry sorbet with rainbow sprinkles.
Until the party date is set, however, Zoe's newly acquired $16 will remain in her piggy bank, a safe-hold which she matter-of-factly describes as "purple with white on the bottom."
There's something more at stake than money, though.
Commenting on the social significance of Zoe's action, Harrington said, "For a child in this day in age to think nothing about herself is just awesome."