I love to teach the unit on animal adaptations! The kids love it even more. Last Thursday, I pulled up this website to see a live shot of two polar bears wrestling in the snow! Talk about a lesson activator. You can't always count on such good action, but they have the "Best of" playlist and I'll play it while the kids are writing in their journals. It has been fantastic! Let me know how you use this link! I'd love to hear of other ways!