Thanks to Jay Stephens for pointing out Spook House Dave, a dandy little internet puppet show I hadn't come across before. Jay describes it as "a cute, creepy cross between Mad Monster Party and the Muppets," and I think that sums it up nicely.

Here's the first episode, "Backpack," which introduces the cast nicely.



A boy. A castle. And a bunch of monsters. What more do you need?