When it comes to children's music, Elizabeth Mitchell is one artist who can get both kids and parents excited. That might have something to do with her pedigree. Before she brought her silken voice and gentle energy to children's music, she honed her chops in the indie world, first as one half of the duo Liz and Lisa (with Lisa Loeb), and later as a founding member of alternative rock heroes Ida. Mitchell's a rare breed in children's music, an artist who's as likely to cover The Velvet Underground as Woody Guthrie—and make it all work.