I recently browsed the iTunes directory of podcasts for kids-safe content. To my surprise, I found a Sesame-Street video-podcast that are made up of 5-minute episodes. This is a great alternative to those advertisement-laden tv programs on kids-central:
You can also directly download the podcasts episodes from here:
There are more than 150 different podcasts under the kids and family category. Some of these are tailored for parents. Needless to say, these are all free content.
For those who have not used iTunes before, here's where to get it: