Saturday, September 30 | 12 – 4 pm Included with Admission or FREE for Members Every year, Nickelodeon goes completely dark for three hours on Worldwide Day of Play to reinforce one simple message: Get up, get out, and go play! So, put down the screen and visit Discovery Gateway for an afternoon packed with fun physical activities including a giant obstacle course, a bee pollination race, a Strider bike adventure zone, and more!