80 Underhill Ave between Bergen St and St. Mark's Ave, Prospect Heights, Brooklyn. Subway: C to Clinton–Washington Aves; 2, 3 to Grand Army Plaza. Hit up P.S. 9 for handmade jewelry, stationery, clothing and treats from more than 50 local artists. Highlights include DanaMade organic-cotton pillows ($75), Pepper Press vintage map note cards ($4 each) and Handsome Miss Mock brass tube necklaces ($100).