Van Seraderian, 8, and his brother, Arek, 9, were on the sidewalk outside their Common Street house waiting for customers to come by their small business.
And in the most time-honored of American traditions, their first-ever venture into the dog-eat-dog world of capitalism was a summer-time lemonade stand.
The brothers were selling the sweetened pink version (50 cents a glass) along with vegetables and herbs from their mom's garden.
Mom Sylvie Seraderian said the stand was a way for them to understand how to make money "instead of just spending it."
"It's time to work," she said with a laugh.
Coming up Common were the Daly siblings, led by big sister, Emma, who purchased four glasses after learning of its reasonable price.
It turned out that Emma, 12, is an entrepreneur herself, making and selling candies on her street. Butter and chocolate are her speciality.
"I wanted to come and help another business," said Emma.