CHICAGO (WLS) -- Thursday's Daley Plaza Farmers Market had a fun twist to celebrate Chicago Food Day.
There was a treasure hunt for prizes from local businesses; they're calling it "hidden harvest."
People who followed clues on Twitter scored free cooking classes, gift cards and even cash.
There were also several workshops on how to eat healthier.
Chicago Food Day is part of a national movement designed to get people to eliminate processed foods from their diets.