There are a lot of freebies that are included with Audible. I recently found that I can listen to some podcasts on it.
Goofus and Gallant was a great comic from Highlights magazine. They recently started a podcast for kids. I listened to the first episode so far. It was fun and didn’t require too much thought. It was a story about Grandma going away and leaving the boys in charge of her guinea pigs and plants. The lesson was to find a happy medium in your tasks. Don’t go overboard and don’t ignore the tasks. The music was a little annoying, but the story was ok. Definitely for kids, though.