Haunting Halloween Costume Lab. Join us at the Elizabeth Street Garden for McNally Jackson's Fiendishly Fun, Ghoulishly Great, Wonderfully Weird, Halloween Costume Lab. Whether kids need a jewel-encrusted sword, enchanted mask, magic wand, glittering headgear, monstrous horns, or gossamer wings, our team of Costume Wizards will help kids design and conjure Halloween costume masterpieces. Hosted by Yvonne Brooks. All ages welcome. Free. Elizabeth Street Garden: Walk 2 blocks East on Prince, turn right onto Elizabeth Street (between Prince and Spring).