International Polar Bear Day is a great time to teach kids more about the imperiled polar bear. Did you know that polar bears are so used to cold weather that they cannot handle temperatures above 50 degrees F? Pollution and poaching are the main reasons that polar bear populations are still decreasing. Head over to the national Wildlife Federation for 13 things you may not know about polar bears. See all of our polar bear crafts and recipes for a fun afternoon with the kids!