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—craft focal points include paper, textiles, plastic, glass and metal (all safe for little hands)! Watch Bill Bywater sculpt extinct animals from ice (daily noon–3pm), make wearable, washable circuits, recycled glass magnets, paper lanterns, self-watering planters and more. Purchase tickets for select workshops online. All ages.