Celebrate the season with an environmentally friendly twist at this hands-on affair. No need to buy craft supplies—little scientists visiting New York Hall of Science can bend, sculpt and animate their own holiday projects via workshops, demos and artists’ installations. This year’s event focuses on a different recyclable material every day—textiles (Dec 27), paper (Dec 28), plastic (Dec 29) and metal (Dec 30). Watch a sculptor create extinct animals from ice, make wearable, washable circuits, recycled glass magnets, paper lanterns, self-watering planters and more. Purchase tickets for select workshops online. All ages.