With wacky skits, outrageous songs and pun-filled cartoons, this wildly popular children's series from the 1970s made learning silly and fun. This compilation includes some of the show's best episodes and all its favorite recurring characters. Look for Letterman, the far-too-literal superhero, and Easy Reader, who helps kids discover the joy of words. The talented cast includes Bill Cosby, Morgan Freeman and Rita Moreno.