New York( CNN) Seven years ago, Tony Hillery was volunteering at a New York City public school in Harlem.
In the lunchroom one day, he met a kindergartner who told him that tomatoes grew in the supermarket.
“It was a real conversation, and she was adamant, ” he remembered. “And then I did an informal poll with the other students, and they agreed. They had no notion what is healthy food or where it comes from.”