NBC News Nightly News: Kids Edition (December 3, 2022)

’Tis the Season! Have you ever wondered how long it takes to grow a Christmas tree? We have the details. Inspiring Kids series continues: Meet the 11-year-old who is hoping to inspire others on and off the golf course. Is laughter the best medicine? We take a look at the science behind laughing. Plus, polar plunge: We dive into the world of polar bears and find out what makes these marine mammals so unique!