Here's an animated segment from a 1970s Sesame Street episode that teaches kids about ecology. (and maybe a little on tolerance...)
Reconize the voice of the man? It's Daws Butler! He was the voice actor responsible for many classic Hanna Barbera characters such as Yogi Bear, Snagglepuss, Mr. JInks, Elroy Jetson, Huckleberry Hound and many others!