That language explosion I predicted a long time ago for imoto is now blowing up and onechan has been loving to "draw letters" in both English and Japanese for a couple of months now, so my usual practice of entertaining the girls with anime theme songs/AMVs and Japan-inflected music videos from YouTube is going to go on the back burner this summer. What I'm looking for now are kids' shows that delight in wordplay and storytelling, particularly ones we can watch for free on YouTube or Veoh.
So far the Full Metal Archivist has discovered a few episodes of an old favorite of hers when she first came to the States, Wishbone:
And I've noticed that there's a good amount of Between the Lions on teh U2bes:
Any other suggestions?