I'm not quite sure how I can describe Lil' Bush to you, so I won't even try. Even the previews can't quite do it justice. All I can say is that it's one of the most hilarious shows I've ever seen. It's not perfect by any means; some parts of it are kind of hokey, especially the bits with Bush's rock band. But imperfections aside, I can't remember the last time a 30-minute cartoon had me laughing so hard. It's definitely worth checking out. The season is officially over, but they're still showing reruns. You can find a schedule here.
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