Animal Jam Watch videos, play games, and meet the newest animals! (AD) GET THE GUIDE Official Insider's Guide Meet the Mammals! They're warm-blooded and hairy. Check out pictures, videos, and facts. Cheetah Fastest land mammal Lion See why these big cats rule. KANGAROO CAN LEAP 30 FEET! River Otter LOVES TO SLIDE! Watch all the videos! More Snowy Owl They're amazing hunters. Watch more videos! Visit Nat Geo Kids on YouTube. Giant Panda They spend most of their time eating. Cool Videos! Check out all the YouTube playlists.