Broadway will morph into a giant playground with 12 illuminated seesaws that passersby can hop on and interact with through the end of the month. The Garment District Alliance is unveiling the seesaw installation, dubbed "Impulse," on Monday, Jan 6, on Broadway between 37th and 38th streets. When activated, the seesaws, which range in length from 16 to 24 feet, radiate light and make music, transforming visitors into musicians and artists, according to the organization. Created by Lateral Office, CS Design Inc., "Impulse" is meant to embody the idea of serialism, repetition and variation to produce zones of intensity and calm, its producer, Creos says. It's been shown around North America, including in Niagara Falls, Boston, Montreal and in other cities. Your inner child will be able to give its own Broadway performance through Jan 31, during which the block will be completely closed to vehicular traffic.