For nearly a century, America has loved cartoons. We love talking dogs and courageous mice. We fantasize about giant robots and rocket rides through space. Every Saturday, millions of kids pile in front of their basement TVs, chomping sugary cereals and delighting in animated adventures: Scrooge McDuck seeking troves of gold, Elmer Fudd hunting wascawy wabbits, Tom chasing Jerry, Ren conning Stimpy, Itchy murdering Scratchy ... When you think about it, cartoons are the first pop culture a child sees. Before they've heard an entire Raffi CD, kids have already memorized the Disney pantheon, from Chip and Dale to Baloo...