We explain why we decorate our Christmas trees | Nightly News: Kids Edition

’Tis the season! From Christmas trees to Santa Claus, to reindeer and snow, we’ve got a holiday preview. Do you know why we decorate our Christmas trees? Then, we explain our taste buds, the science behind what tastes good, and why our taste changes over time. And, monkey business! We’re at the Lincoln Park Zoo where scientists are using technology to study how primates like gorillas and monkeys use their brains to solve problems. Plus, actress Reese Witherspoon speaks with Jackson Daly about her new children’s book, “Busy Betty & The Perfect Christmas Present.” And, what you thankful for? Some kids tell us what makes them thankful this holiday season. » Subscribe to NBC News: http://nbcnews.to/SubscribeToNBC » Watch more NBC video: http://bit.ly/MoreNBCNews NBC News Digital is a collection of innovative and powerful news brands that deliver compelling, diverse and engaging news stories. NBC News Digital features NBCNews.com, MSNBC.com, TODAY.com, Nightly News, Meet the Press, Dateline, and the existing apps and digital extensions of these respective properties. We deliver the best in breaking news, live video coverage, original journalism and segments from your favorite NBC News Shows. Connect with NBC News Online! NBC News App: https://apps.nbcnews.com/mobile Breaking News Alerts: https://link.nbcnews.com/join/5cj/breaking-news-signup?cid=sm_npd_nn_yt_bn-clip_190621 Visit NBCNews.Com: http://nbcnews.to/ReadNBC Find NBC News on Facebook: http://nbcnews.to/LikeNBC Follow NBC News on Twitter: http://nbcnews.to/FollowNBC Follow NBC News on Instagram: http://nbcnews.to/InstaNBC