On a recent visit to the Aquarium, I was stunned to see how much my children knew about aquatic animals, their names, their habitats, what they eat, where they live, and other marine "lingo". When I asked them how they knew about all this, they told me they had learnt all this from a show called "Octonauts". It's a cartoon show with a great message and lots of interesting and accurate information about marine animals.
I agree, Sesame Street, Play school, Mister Maker are all excellent shows for kids which give them a great imagination.