Time Out says
The patrons of this second-hand, artesan and antiques market are the local 'gegants' (large figures often made of papier mâché which often participate in local festivals; a volunteer stands inside the figure to carry it and move it along), Sol and Lluna (Sun and Moon). In Plaça Nova, every second Sunday of the month you'll find all stalls selling all kinds of objects. It's not huge, but the stock is varied and you might find any number of interesting items. And if you have kids, they'll enjoy the workshops on offer, such as face painting.