This ensemble of Strings for Kids played  for shoppers at the Farmer's Market a couple of weeks ago. They are serious and talented musicians. Strings For Kids is a free music program run by Artspace in collaboration with Greenfield Public Schools. Students who enroll in Strings For Kids are offered a choice of learning to play violin or cello, and receive the following benefits at no charge: Instrument loan for the duration of enrollment Weekly in-school group instruction led…