Week 4 of the Medford Farmers Market — the School’s Out/Summer Fun edition — will feature live music by Jon Waterman (original rock and blues) from 3 to 5 p.m. and Niteshade (funk/soul) from 5 to 7 p.m. There also will be Henna body art and face-painting, the latter starting at 4 p.m., plus Medford Family Network activities and free books from 3 to 6 p.m. And following today’s market, the jazz entourage Annie and the Fur Trappers will perform on the Condon Shell stage, kicking off the city’s Summer Concert Series. Visit the Farmers Market website for the list of this week’s 24 vendors. The market takes place at the Condon Shell park from 3 to 7 p.m. every Thursday through October 12.